{"product_id":"bsw-hex-allen-key-wrench-long-short-arm-ball-flat-end-cr-v-steel","title":"BSW HEX ALLEN KEY WRENCH LONG-SHORT ARM BALL-FLAT END Holder CR-V STEEL","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eBSW Hex Allen Key Wrench Set — Long \u0026amp; Short Arm, Ball \u0026amp; Flat End in CR-V Steel\u003c\/h2\u003e\n\u003cp\u003eWhen a standard hex key slips or strips a fastener, the problem is usually the wrong size or a tool that flexes under torque. DIYers, mechanics, and maintenance technicians working with BSW (British Standard Whitworth) hex socket fasteners need a wrench that fits precisely and holds up under repeated use. This BSW hex Allen key wrench set is built for exactly that job.\u003c\/p\u003e\n\u003cp\u003eEach wrench is machined from CR-V (Chrome Vanadium) steel — a material known for its toughness and resistance to wear under cyclic stress. The set covers BSW hex sizes from 1\/16\" (≈1.6 mm) up to 9\/16\" (≈14.3 mm), with both long-arm and short-arm configurations on every key. Choose between a flat-end tip for full-face socket engagement or a ball-end tip that allows up to approximately 25–30° of off-axis access in confined spaces.\u003c\/p\u003e\n\u003cp\u003eTypical applications include adjusting set screws on BSW-threaded machinery, servicing vintage British motorcycles and automobiles, tightening grub screws on pulleys and couplings, and general workshop maintenance where BSW hex fasteners are specified. The long arm delivers extra torque leverage; the short arm gives knuckle clearance in tight bays.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e⚙️\u003c\/span\u003e \u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for BSW (British Standard Whitworth) hex socket fasteners. Verify your fastener standard before ordering — BSW hex sizes differ from metric and UNC\/UNF inch hex sizes.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These BSW Hex Allen Key Wrenches\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e \u003cstrong\u003eCR-V Steel Construction\u003c\/strong\u003e — Chrome Vanadium alloy resists deformation and surface wear through repeated high-torque cycles, maintaining accurate hex geometry over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e↔️\u003c\/span\u003e \u003cstrong\u003eDual-Arm Design\u003c\/strong\u003e — Every key includes both a long arm (for torque leverage) and a short arm (for access in confined spaces), giving you two tools in one.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚽\u003c\/span\u003e \u003cstrong\u003eBall End \u0026amp; Flat End Options\u003c\/strong\u003e — Select Ball Head for angled access up to approximately 25–30° off-axis, or Flat Head for maximum contact area and higher torque transfer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e \u003cstrong\u003eFull BSW Size Range\u003c\/strong\u003e — Covers 1\/16\" through 9\/16\" in twelve incremental steps, so you have the right fit for fine set screws through large grub screws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e \u003cstrong\u003eFlexible Pack Quantities\u003c\/strong\u003e — Available in packs of 1, 2, 5, or 10 per size, letting you stock exactly what your workshop or job site requires without over-ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e \u003cstrong\u003eCorrosion-Resistant Finish\u003c\/strong\u003e — The surface treatment reduces oxidation in workshop environments where tools are exposed to cutting fluids, oils, and humidity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — BSW Hex Allen Key Wrench\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStandard\u003c\/th\u003e\n\u003ctd\u003eBSW (British Standard Whitworth) Hex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eCR-V (Chrome Vanadium) Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Style Options\u003c\/th\u003e\n\u003ctd\u003eFlat Head \/ Ball Head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArm Configuration\u003c\/th\u003e\n\u003ctd\u003eLong arm + Short arm (dual-arm per key)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e1\/16\" – 9\/16\" (≈1.6 mm – 14.3 mm), 12 sizes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e1\/16, 5\/64, 3\/32, 1\/8, 5\/32, 3\/16, 7\/32, 1\/4, 5\/16, 3\/8, 1\/2, 9\/16 (inch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBall End Off-Axis Angle\u003c\/th\u003e\n\u003ctd\u003eTypically up to 25–30°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity Options\u003c\/th\u003e\n\u003ctd\u003e1, 2, 5, or 10 pieces per size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOverall Length\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (per piece)\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-faq\"\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between BSW hex and standard metric or SAE hex sizes?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eBSW (British Standard Whitworth) hex sizes follow an inch-based system historically used in British engineering. The across-flats dimensions do not match metric hex sizes or SAE UNC\/UNF hex sizes of nominally similar measurements. Using a metric or SAE key in a BSW socket — or vice versa — risks rounding the fastener corners. Always confirm your fastener standard before selecting a wrench.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen should I choose the Ball Head over the Flat Head?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eChoose the Ball Head when the fastener is recessed at an angle or when surrounding components block a straight-on approach. The ball tip allows entry at up to approximately 25–30° off-axis, which is useful in engine bays, panel interiors, and machinery frames. Use the Flat Head when you need maximum torque transfer — the flat tip seats fully in the socket and handles higher loads without the slight contact-area reduction of a ball end.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is CR-V steel and why does it matter for hex keys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eCR-V stands for Chrome Vanadium steel, an alloy that combines chromium (for hardness and corrosion resistance) with vanadium (for toughness and fatigue resistance). For hex keys, this means the tool can absorb repeated torque cycles without developing micro-cracks or losing its hex geometry — a common failure mode in lower-grade carbon steel keys. The result is a longer service life and more consistent fit across the fastener's lifetime.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose the right size for my fastener?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMeasure the across-flats width of the hex socket opening with a caliper, then match it to the BSW hex size listed in the variant options. If you are unsure of the standard, check the original equipment documentation or compare against a known BSW reference gauge. A correctly sized key should seat fully with no play; any wobble indicates a size mismatch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich arm should I use — long or short?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eUse the long arm when you need extra torque leverage — for example, when breaking loose a tight set screw or driving a fastener to a specific torque. Use the short arm when space around the fastener is limited and the long arm would contact surrounding components. The short arm also gives better knuckle clearance in recessed pockets. Both arms are on the same key, so you can switch without changing tools.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these wrenches suitable for vintage British motorcycles and automobiles?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. BSW hex fasteners were widely used in British motorcycle and automotive manufacturing through the mid-20th century. This set covers the size range most commonly encountered in that equipment — from small 1\/16\" set screws on carburetors and controls up to larger 1\/2\" and 9\/16\" grub screws on drive components. Confirm the specific sizes your vehicle requires before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat pack quantity should I order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIf you need a single replacement key for a specific size, order a pack of 1. For workshop stock where a size sees frequent use, packs of 5 or 10 reduce the risk of running out mid-job. Packs of 2 are a practical middle ground for occasional-use sizes. Select the head style and thread size first, then choose the pack quantity that matches your usage pattern.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Head Style, Thread Size, and Pack Quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Flat Head \/ 1\u002616 \/ 10","offer_id":52378100367634,"sku":"BM1451-0","price":2.03,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 5\u002664 \/ 5","offer_id":52378100400402,"sku":"BM1451-1","price":2.03,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 3\u002632 \/ 5","offer_id":52378100433170,"sku":"BM1451-2","price":2.16,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 1\u00268 \/ 5","offer_id":52378100465938,"sku":"BM1451-3","price":2.3,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 5\u002632 \/ 5","offer_id":52378100498706,"sku":"BM1451-4","price":3.25,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 3\u002616 \/ 2","offer_id":52378100531474,"sku":"BM1451-5","price":2.38,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 7\u002632 \/ 2","offer_id":52378100564242,"sku":"BM1451-6","price":3.06,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 1\u00264 \/ 1","offer_id":52378100597010,"sku":"BM1451-7","price":2.43,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 5\u002616 \/ 1","offer_id":52378100629778,"sku":"BM1451-8","price":3.79,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 3\u00268 \/ 1","offer_id":52378100662546,"sku":"BM1451-9","price":5.02,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 1\u00262 \/ 1","offer_id":52378100695314,"sku":"BM1451-10","price":9.23,"currency_code":"USD","in_stock":true},{"title":"Flat Head \/ 9\u002616 \/ 1","offer_id":52378100728082,"sku":"BM1451-11","price":13.86,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 1\u002616 \/ 1","offer_id":52378100760850,"sku":"BM1451-12","price":2.16,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 5\u002664 \/ 1","offer_id":52378100793618,"sku":"BM1451-13","price":2.24,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 3\u002632 \/ 1","offer_id":52378100826386,"sku":"BM1451-14","price":2.3,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 1\u00268 \/ 1","offer_id":52378100859154,"sku":"BM1451-15","price":2.52,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 5\u002632 \/ 1","offer_id":52378100891922,"sku":"BM1451-16","price":2.52,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 3\u002616 \/ 1","offer_id":52378100924690,"sku":"BM1451-17","price":2.65,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 7\u002632 \/ 1","offer_id":52378100957458,"sku":"BM1451-18","price":2.92,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 1\u00264 \/ 1","offer_id":52378100990226,"sku":"BM1451-19","price":3.47,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 5\u002616 \/ 1","offer_id":52378101022994,"sku":"BM1451-20","price":5.1,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 3\u00268 \/ 1","offer_id":52378101055762,"sku":"BM1451-21","price":7.55,"currency_code":"USD","in_stock":true},{"title":"Ball Head \/ 1\u00262 \/ 1","offer_id":52378101088530,"sku":"BM1451-22","price":14.67,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Picture1of5_d8f4f5df-ee3b-4172-a1da-f52c054c8aa4.jpg?v=1781776119","url":"https:\/\/homediyer.com\/de\/products\/bsw-hex-allen-key-wrench-long-short-arm-ball-flat-end-cr-v-steel","provider":"HomeDIYer","version":"1.0","type":"link"}