DescriptionBosch 1/4 In. x 4 In. Cobalt Drill BitBosch cobalt drill bits are specially designed for drilling in hard steel. Thick web helix delivers fast material removal combined with increased durability for maximum efficiency and performance. Each bit is manufactured to exacting specifications and features a split point that starts on contact with no walking or skating， eliminating the need for a center punch.FeaturesWithstands high-temperature applications for extended periods of time (up to 1，100°F)Rigid， thick web design adds stability to bit in tough applicationsSurface hardened to penetrate tough abrasive materialsAvailable in jobber length， full shankBest used for drilling into light-gauge metal， high-carbon steel， aluminum and ally steel， cast iron， stainless steel and titaniumSpecificationsBrand NameBoschAssembled Weight (lbs)0.29Bit Diameter1/4 In.Bit MaterialCobaltBit TypeTwistCalifornia Proposition 65 Warning RequiredYesCountry of OriginChinaDiameter1/4 inFlute Length (in)2.755999globalTradeItemNumber (GTIN)00000346333558Internal Supplier Part #2610036862Internet Product Code (IPC)1984B59FC2BManufacturer WarrantyProduct Defects OnlyMinimum Chuck Size Required1/4 inPackage Contents1 BitPackage Weight0.29Package Weight (lbs)0.29Recommended Safety EquipmentEye， ear and dust protectionShank Diameter0.25UPC000346333558Manuals Warranty - PDF