Specification Brand : FUZHUI BulletPoint1 : Efficient Drilling: Made of M35 cobalt material with 89HRC hardness, this step drill bit higher working efficiency at higher speeds, making drilling and easier. BulletPoint2 : Versatile Compatibility: Featuring a standard 1/4in hex shank, this drill bit is compatible with most tools and electric drills, providing broad fitting options for various applications. BulletPoint3 : 12 Step Sizes: With a range from 3/16in to 7/8in, this drill bit offers drilling at different diameters, meeting all your woodworking and DIY needs in one convenient tool. BulletPoint4 : Wide Application: Suitable for drilling a variety of materials including metal, wood, and plastic, this versatile drill bit is a must-have for any toolbox. BulletPoint5 : smoothness Cutting: 4 flute is highly effective in chip removal, ensuring smoother and cleaner cuts for -looking results every time. ItemName : 12 Step Spiral Drill Bit for Woodworking, 4 Flute 1/4in Hex Shank, 3/16‑7/8in Size Range, M35 Cobalt Material for Efficient Drilling ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 13 centimeters ItemPackageDimensions_Width : 9 centimeters ItemTypeKeyword : step-drill-bits Manufacturer : FUZHUI ModelNumber : FUZHUI41nrbc7p5z NumberOfItems : 1 PartNumber : FUZHUI41nrbc7p5z ProductDescription : Item Type: Step Drill Bit Material: M35, Cobalt Hole Diameter: 3/16in, 1/4in, 5/16in, 3/8in, 7/16in, 1/2in, 9/16in, 5/8in, 11/16in, 3/4in, 13/16in, 7/8in. Shank Diameter: 1/4in.