Specification Brand : Tyenaza BulletPoint1 : Spiral Flute Drill: Speed helix design for three times faster drilling than standard bits,sharp and twisted flute will make the drilling be more easy and effortless. BulletPoint2 : Black Oxide Finish: Surface treated with abrasion-resistant black oxide,adds lubricity, better for smoother drilling, reduced heat and extended drill bit life BulletPoint3 : Design: Split point tip starts on to keep the bit from walking for fast accurate holes,for clean results. BulletPoint4 : Wide Application: For use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials BulletPoint5 : Please Note: To make clean and precise holes, water is required for lubrication and cooling when drilling metals. Increased use of water lubrication will extend drill bit life Color : One Color ExternallyAssignedProductIdentifier : 7555731337954 ItemName : Reduced Shank Drill Bit,1/2 Round Shank Split Point Tip HSS Twist Flute Spiral Flute Drill Bit Metalworking Black Drills Tools ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 18 centimeters ItemPackageDimensions_Width : 4 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : long-length-drill-bits Manufacturer : Tyenaza ModelNumber : Tyenazanm3w1zuc4g NumberOfItems : 1 NumberOfPieces : 1 PartNumber : Tyenazanm3w1zuc4g ProductDescription : Item Type: Twist Drill Bit Product Material: High Speed Steel Blade Diameter: Approx. 25mm / 0.98in Shank Diameter: 1/2in Application: Suitable for iron, aluminium, copper, stainless steel, high speed steel, manganese steel, various quenched steel parts.