{"product_id":"metric-short-arm-allen-keys-hex-wrench-hexagon-key","title":"Metric Short Arm Allen Keys-Hex Wrench-Hexagon Key 1.5mm - 17mm All Sizes","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMetric Short Arm Allen Keys — Compact Hex Wrenches for Tight-Space Fastening\u003c\/h2\u003e\n\u003cp\u003eWhen a standard-length hex key is too long to fit into a recessed bolt pocket or a crowded assembly bay, the short arm design becomes the only practical option. DIYers, cyclists, furniture assemblers, and maintenance technicians who regularly work in confined spaces know the frustration of a wrench that simply won't clear the surrounding structure. These metric short arm Allen keys are built specifically for those situations.\u003c\/p\u003e\n\u003cp\u003eEach key is machined from chrome vanadium steel (Cr-V) with a black oxide finish for corrosion resistance. The short arm hex wrench set covers sizes from 1.5 mm (approx. 0.059 in) through 17 mm (approx. 0.669 in), available in both ball head and flat head drive styles. Packing options of 1, 2, 5, or 10 pieces let you stock exactly what your workflow requires.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include tightening socket head cap screws on bicycle derailleurs and stem bolts, adjusting set screws on machinery guards where clearance is under 50 mm, and assembling flat-pack furniture with recessed hex fasteners. The short arm format also provides higher torque leverage on the long arm side when needed.\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 Fits all standard metric socket head cap screws (ISO 4762), set screws (ISO 4026–4029), and grub screws with hex drive. Ball head variants engage fasteners at angles up to approximately 25–30°. Verify your fastener's hex socket size before ordering.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Metric Short Arm Allen Keys\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔧\u003c\/span\u003e\u003cstrong\u003eShort Arm Format for Confined Spaces\u003c\/strong\u003e — The reduced arm length clears obstructions that block standard-length hex keys, making these wrenches practical for recessed bolt pockets, tight chassis cavities, and close-tolerance assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003eBall Head \u0026amp; Flat Head Options\u003c\/strong\u003e — Ball head variants allow off-axis engagement at up to approximately 25–30°, useful when direct axial access is blocked. Flat head variants deliver full torque transfer for high-load fastening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\u003cstrong\u003eFull Metric Size Range 1.5 mm – 17 mm\u003c\/strong\u003e — Twelve sizes in a single product line cover the vast majority of metric hex fasteners found in bicycles, furniture, industrial machinery, and automotive accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eChrome Vanadium Steel with Black Oxide Finish\u003c\/strong\u003e — Cr-V construction resists deformation under torque; the black oxide surface treatment reduces surface oxidation in workshop and outdoor environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Quantities (1 \/ 2 \/ 5 \/ 10 pcs)\u003c\/strong\u003e — Order a single key to replace a lost size, or stock a multi-pack for a tool kit, service bench, or resale. Pricing scales with quantity for cost efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\u003cstrong\u003eDual-End Usability\u003c\/strong\u003e — The short arm becomes the driving end in tight spaces; the long arm becomes the driving end when additional torque is needed on accessible fasteners — one key, two working configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Metric Short Arm Hex Wrench\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Type\u003c\/th\u003e\n\u003ctd\u003eHex (Allen \/ Hexagon)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eArm Style\u003c\/th\u003e\n\u003ctd\u003eShort arm (L-shape)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHead Options\u003c\/th\u003e\n\u003ctd\u003eBall head \/ Flat head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e1.5 mm – 17 mm (metric)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Sizes\u003c\/th\u003e\n\u003ctd\u003e1.5, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0, 8.0, 10, 12, 14, 17 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eChrome vanadium steel (Cr-V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSurface Finish\u003c\/th\u003e\n\u003ctd\u003eBlack oxide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBall Head Engagement Angle\u003c\/th\u003e\n\u003ctd\u003eUp to approx. 25–30° off-axis\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePacking Quantity Options\u003c\/th\u003e\n\u003ctd\u003e1 pc \/ 2 pcs \/ 5 pcs \/ 10 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Fastener Standard\u003c\/th\u003e\n\u003ctd\u003eISO 4762, ISO 4026–4029 (metric hex drive)\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 ball head and flat head Allen keys?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eA flat head (standard) hex key must be inserted straight into the fastener socket — it delivers full torque and is the correct choice for high-torque applications. A ball head key has a rounded tip that allows engagement at angles of approximately 25–30° off the fastener axis, which is useful when you cannot align the wrench directly with the bolt. For maximum torque, always use the flat end of a ball head key or choose a flat head key.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhy choose a short arm hex key over a standard-length one?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eShort arm Allen keys are designed for situations where the surrounding structure limits how far a wrench can extend. Common examples include recessed bolt pockets in bicycle frames, fasteners inside equipment housings, and furniture joints where the adjacent panel blocks a long arm. The trade-off is that the short arm provides less torque leverage on the driving end, so they are best suited for moderate-torque fasteners.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich size should I choose for my application?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMatch the hex key size to the across-flats (AF) dimension of your fastener's socket — this is typically stamped on the fastener head or listed in the product's assembly manual. Common sizes: M3 screws use a 2.5 mm key; M4 use 3 mm; M5 use 4 mm; M6 use 5 mm; M8 use 6 mm; M10 use 8 mm. If you are unsure, measure the socket width with a caliper before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these hex keys suitable for bicycle maintenance?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. Short arm Allen keys are widely used in bicycle maintenance for stem bolts, handlebar clamps, derailleur limit screws, bottle cage bolts, and saddle rail clamps. The 2.0 mm, 2.5 mm, 3.0 mm, 4.0 mm, 5.0 mm, and 6.0 mm sizes cover the majority of hex fasteners found on road and mountain bikes. The ball head option is particularly useful for reaching angled bolts on integrated cockpits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I know if the hex key will corrode in outdoor or humid conditions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese keys use a black oxide surface treatment over chrome vanadium steel. Black oxide provides moderate corrosion resistance suitable for typical workshop and occasional outdoor use. For prolonged exposure to moisture or salt environments, wipe the keys with a light machine oil after use and store them in a dry location. Black oxide is not equivalent to stainless steel or zinc plating in terms of corrosion resistance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these keys on imperial (SAE) hex fasteners?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThese are metric-sized keys and are not interchangeable with SAE (imperial) hex fasteners. Using a metric key on a close-but-not-matching imperial fastener — or vice versa — risks rounding the socket. Always confirm whether your fastener uses metric (mm) or imperial (inch) sizing before selecting a key. If you need SAE hex keys, please contact us to confirm availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat packing quantity should I order?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIf you need a single replacement for a lost or worn key, the 1 pc option is the most economical choice. The 5 pc and 10 pc packs offer a lower per-unit cost and are practical for service benches, tool kits shared among multiple users, or resale. The 2 pc option suits situations where you want a spare on hand without committing to a larger quantity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your type, size, and packing quantity above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"Ball head \/ 5.0mm \/ 1pcs","offer_id":52378095157522,"sku":"LFLGXL15984x1","price":4.0,"currency_code":"USD","in_stock":true},{"title":"Ball head \/ 5.0mm \/ 5pcs","offer_id":52378095190290,"sku":"LFLGXL15984x5","price":14.81,"currency_code":"USD","in_stock":true},{"title":"Ball head \/ 5.0mm \/ 10pcs","offer_id":52378095223058,"sku":"LFLGXL15984x10","price":28.87,"currency_code":"USD","in_stock":true},{"title":"Ball head \/ 6.0mm \/ 1pcs","offer_id":52378095255826,"sku":"LFLGXL15985x1","price":4.92,"currency_code":"USD","in_stock":true},{"title":"Ball head \/ 6.0mm \/ 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