{"product_id":"metric-hex-socket-wrench-set-4-17mm-allen-bit-half-inch-drive","title":"4mm-17mm Hex Socket Wrench Metric Allen Socket Hex Bit 1\/2\" Drive Size Optional","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\u003cdiv class=\"hdiy-overview\"\u003e\n\u003ch2\u003eMetric Hex Socket Wrench Set 4–17mm — Precision Allen Bit Drive for Fastening Tasks\u003c\/h2\u003e\n\u003cp\u003eWhen a standard wrench won't reach a recessed bolt head, you need a metric hex socket wrench that fits your drive and your fastener. Mechanics, equipment technicians, and serious DIYers who work on bicycles, automotive assemblies, furniture hardware, and industrial machinery all face the same problem: mismatched or incomplete Allen socket sets that slow the job down. This metric hex socket wrench set is built to close that gap.\u003c\/p\u003e\n\u003cp\u003eThe set consists of S2 steel hex bit sockets in metric sizes ranging from 4mm to 17mm (~5\/32\" to ~43\/64\"), designed for use with a 1\/2\" square drive ratchet or breaker bar. Two shaft lengths are available — 55mm (~2.2\") and 100mm (~3.9\") — to handle both shallow and deep-access fastening situations. Individual sizes (H4 through H17) and multi-piece sets (8-piece H4–H14 or H4–H17) are offered in packs of 1, 2, or 5 pieces.\u003c\/p\u003e\n\u003cp\u003eTypical use cases include tightening socket head cap screws on bicycle cranks and stems, driving Allen bolts on engine components and gearboxes, assembling flat-pack furniture with recessed hex fasteners, and servicing industrial equipment where standard hex keys lack the torque leverage of a drive-tool setup. The 1\/2\" drive interface makes this set compatible with most professional and prosumer ratchet sets already in your toolbox.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-compat\"\u003e\n\u003cspan class=\"hdiy-compat-icon\"\u003e🔧\u003c\/span\u003e \u003cstrong\u003eDrive Compatibility:\u003c\/strong\u003e Fits standard 1\/2\" square drive ratchets, breaker bars, and torque wrenches. Metric sizing — not compatible with SAE\/imperial hex fasteners.\u003c\/div\u003e\n\u003cdiv class=\"hdiy-features\"\u003e\n\u003ch2\u003e✅ Key Features of These Metric Hex Socket Wrenches\u003c\/h2\u003e\n\u003cul class=\"hdiy-list\"\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\u003cstrong\u003eWide Size Range:\u003c\/strong\u003e Covers H4 through H17 (4mm–17mm), addressing the most common metric Allen bolt sizes found in automotive, bicycle, and machinery applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\u003cstrong\u003eTwo Shaft Lengths:\u003c\/strong\u003e Choose 55mm (~2.2\") for compact access or 100mm (~3.9\") for deeper recesses and greater torque leverage — both available across the size range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\u003cstrong\u003e1\/2\" Drive Interface:\u003c\/strong\u003e Standard square drive shank integrates directly with 1\/2\" ratchets, extensions, and torque wrenches for controlled, repeatable fastening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\u003cstrong\u003eS2 Steel Construction:\u003c\/strong\u003e Manufactured from S2 tool steel, which offers higher hardness and impact resistance compared to standard chrome vanadium, reducing tip rounding under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\u003cstrong\u003eFlexible Pack Options:\u003c\/strong\u003e Available as single pieces, 2-piece, 5-piece, or complete 8-piece sets — buy exactly what you need for a repair or stock up for a full workshop kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\u003cstrong\u003ePrecision Hex Profile:\u003c\/strong\u003e Machined hex tip geometry maintains close tolerance fit with socket head cap screws, reducing cam-out and fastener damage during high-torque applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-table-wrap\"\u003e\n\u003ch2\u003e📐 Technical Specifications — Metric Hex Socket Wrench Set\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDrive Size\u003c\/th\u003e\n\u003ctd\u003e1\/2\" (12.7mm) square drive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e4mm – 17mm (H4 to H17)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAvailable Shaft Lengths\u003c\/th\u003e\n\u003ctd\u003e55mm (~2.2\") \/ 100mm (~3.9\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eS2 tool steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFastener Compatibility\u003c\/th\u003e\n\u003ctd\u003eMetric socket head cap screws (Allen\/hex bolts)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Options\u003c\/th\u003e\n\u003ctd\u003e1 PCS \/ 2 PCS \/ 5 PCS \/ 8-piece set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSet Configurations\u003c\/th\u003e\n\u003ctd\u003eH4–H14 (8 PCS), H4–H17 (8 PCS), individual sizes H4–H17\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\u003eWhich size should I choose for bicycle crank bolts and stem bolts?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eMost bicycle crank bolts use an 8mm Allen socket (H8), while stem bolts and handlebar clamps typically use 4mm, 5mm, or 6mm (H4, H5, H6). If you work on multiple bike components, the 8-piece H4–H14 set covers the full range you are likely to encounter without buying individual pieces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is the difference between the 55mm and 100mm shaft lengths?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eThe 55mm (~2.2\") shaft is suited for fasteners in open or shallow locations where clearance is not an issue. The 100mm (~3.9\") shaft provides additional reach into recessed bolt pockets and also increases the moment arm slightly, which can be useful when breaking loose tight fasteners before switching to a torque wrench for final tightening.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs S2 steel stronger than chrome vanadium (Cr-V) for hex sockets?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS2 tool steel is generally harder and more impact-resistant than standard chrome vanadium alloy, making it a common choice for hex bit sockets that experience direct impact or high torque. Cr-V is well-suited for hand tools under moderate load, but S2 is preferred when using a ratchet or impact driver at higher torque values, as it resists tip deformation more effectively.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWill these sockets work with my existing 1\/2\" drive ratchet and extensions?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eYes. The shank is machined to the standard 1\/2\" (12.7mm) square drive specification, so it is compatible with any 1\/2\" drive ratchet, breaker bar, torque wrench, or extension bar that follows the standard square drive interface. They are not compatible with 3\/8\" or 1\/4\" drive tools without an adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan I use these with an impact wrench or impact driver?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS2 steel hex bit sockets are more impact-tolerant than standard hand-tool alloys, but these are not rated as dedicated impact sockets. For occasional low-torque impact use they may perform adequately, but for sustained high-torque impact applications, sockets specifically rated for impact use (typically black phosphate finish, thicker walls) are the appropriate choice. Contact us to confirm suitability for your specific application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I choose between buying individual pieces versus the 8-piece set?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eIf you need one or two specific sizes for a defined repair job, individual pieces (1 PCS or 2 PCS packs) are the cost-effective option. If you maintain a variety of equipment with different fastener sizes, the 8-piece H4–H14 or H4–H17 set provides full coverage and is more economical per piece. The H4–H17 set adds H16 and H17 for larger fasteners found on heavy machinery and automotive suspension components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre these sockets corrosion-resistant for outdoor or wet-environment use?\u003c\/summary\u003e\n\u003cdiv class=\"hdiy-faq-body\"\u003e\n\u003cp\u003eS2 steel is not inherently stainless. For outdoor storage or use in humid environments, wipe the sockets with a light machine oil after use to prevent surface oxidation. The surface finish (see variant options) may provide additional protection. For marine or continuously wet environments, stainless steel hex keys are a more appropriate long-term choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hdiy-cta\"\u003e🛒 Select your Length, Size, and Pack Of above, then add to cart.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"HomeDIYer","offers":[{"title":"100mm \/ H4-H17(8PCS) \/ 1 Set","offer_id":52378121732370,"sku":"AATYHSZWLG1795x1","price":60.83,"currency_code":"USD","in_stock":true},{"title":"55mm \/ H4-H14(8PCS) \/ 1 Set","offer_id":52378121765138,"sku":"AATYHSZWLG1804x1","price":31.74,"currency_code":"USD","in_stock":true},{"title":"100mm \/ H4 \/ 1 PCS","offer_id":52378121797906,"sku":"AATYHSZWLG1786x1","price":5.58,"currency_code":"USD","in_stock":true},{"title":"100mm \/ H4 \/ 2 PCS","offer_id":52378121830674,"sku":"AATYHSZWLG1786x2","price":10.4,"currency_code":"USD","in_stock":true},{"title":"100mm \/ H4 \/ 5 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