Specification Brand : uxcell BulletPoint1 : Specifications: Drilling Dia.: 21mm; shank size: 7.8mm; total length: 78mm. Round shank, cemented carbide cutter and solid hardened steel body. BulletPoint2 : Applications: Can be used for drilling holes on wood and plastic products, furniture, door hinge. Used on cutting wood, plywood, solid wood boards, MDF, plastics, fiberglass etc. BulletPoint3 : Features: Tungsten carbide cutting tip with special heat treatment for sharp cutting edge, high hardness, non-burrs and durable use. Arc curve design head for easy chip-removal, more efficient perforation BulletPoint4 : How To Use: Suitable for bench drill, vertical drilling machine, CNC carving machine. Processing hardwood or other hard materials should be injected with water to improve the quality and accuracy of drilling, and extend the life of the hole opener. BulletPoint5 : Tips: Maximum speed: 2000rpm. Used on desktop (fixed) equipment, and can NOT be used on handheld power tools (such as hand drill or electric drill). Can not drill metal and non-ferrous metal. To avoid causing damage, be sure no nails or other metal objects in wood before drilling. The cutting edge and tip of the opener should be sharpened in time. Color : Blue Silver Tone ExternallyAssignedProductIdentifier1 : 700724401335 ExternallyAssignedProductIdentifier2 : 711331617583 ExternallyAssignedProductIdentifier3 : 0700724401335 ExternallyAssignedProductIdentifier4 : 0711331617583 ExternallyAssignedProductIdentifier5 : 00700724401335 FinishType : Silver ItemDisplayDimensions_Length : 7.8 centimeters ItemName : uxcell Forstner Drill Bits 21mm, Tungsten Carbide Wood Hole Saw Auger Opener, Woodworking Hinge Hole Drilling Boring Bit Cutter Cutting Tool (Blue, Silver Tone) ItemPackageDimensions_Height : 2.9972 centimeters ItemPackageDimensions_Length : 21.0058 centimeters ItemPackageDimensions_Width : 16.002 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : boring-bits Manufacturer : uxcell Material : Carbide ModelNumber : a13092600ux0085 NumberOfItems : 1 PartNumber : a13092600ux0085 ProductSiteLaunchDate : 2013-11-28T10:20:12.662Z Size : 21mm SurfaceRecommendation : Metal UnitCount : 1 UnspscCode : 27110000