{"product_id":"hrc89-m35-cobalt-step-drill-bit-4-22mm-5-21mm-tialn-coated-step-drill-1-4-inch-hex-shank","title":"HRC89 M35 Cobalt Step Drill Bit 4-22mm\/5-21mm TiAlN Coated Step Drill 1\/4 Inch Hex Shank","description":"Description: \u003cbr\u003e\nHigh-speed steel cobalt\/M35; \u003cbr\u003e\nMore than 4241and 6542 high-speed steel materials. \u003cbr\u003e\n  \u003cbr\u003e\nIndustrial-grade TiAlN plating \u003cbr\u003e\n1. Form Al2O3 protection cover, fit for high speed drilling; \u003cbr\u003e\n2. Can work without coolant; \u003cbr\u003e\n3. Hardness up to HRC89; \u003cbr\u003e\n4. Life service 2-3 times longer the common HSS-Co M35 step drill. \u003cbr\u003e\n  \u003cbr\u003e\nUses: \u003cbr\u003e\nSuitable for Aluminum, insulation board, PVC board chamfer,steel, aluminum, sheet metal, carbon steel, 304 stainless steel, etc. \u003cbr\u003e\n  \u003cbr\u003e\nSpecification: \u003cbr\u003e\nMaterial: HSS-Co M35 Cobalt; \u003cbr\u003e\nSurface treatment: TiAlN Coating; \u003cbr\u003e\nShank: 1\/4 Inch Hex Shank; \u003cbr\u003e\nHardness: HRC89; \u003cbr\u003e\n  \u003cbr\u003e\nFeatures: \u003cbr\u003e\n1. Spiral groove design(Great chip removal); \u003cbr\u003e\n2. 118 ° X type bit design(No slipping, drill from any angle); \u003cbr\u003e\n3. 1\/4 Inch hex shank design; \u003cbr\u003e\n4. CNC, CBN grinding wheel(Higher accuracy); \u003cbr\u003e\n5. A substantial increase in the wear resistance and oxidation resistance; \u003cbr\u003e\n6. 4-22(10 steps), 5-21(9 Steps) for choosing. \u003cbr\u003e\n  \u003cbr\u003e\nPackage Included: \u003cbr\u003e\n1 x TiAlN M35 Hss Co Step Drill ","brand":"GreenZech","offers":[{"title":"4-22mm","offer_id":42664975073450,"sku":"JG-DB3594537","price":19.1,"currency_code":"GBP","in_stock":true},{"title":"5-21mm","offer_id":42664975106218,"sku":"JG-DB3594538","price":18.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0280\/6179\/4375\/products\/4e9ee39e-1e79-4667-bbdd-81f82c646ea3.jpg?v=1646796771","url":"https:\/\/greenzech.com\/products\/hrc89-m35-cobalt-step-drill-bit-4-22mm-5-21mm-tialn-coated-step-drill-1-4-inch-hex-shank","provider":"GreenZech","version":"1.0","type":"link"}