This drill has a shank and tip diameter of approximately 1/8 inch, an overall length of approximately 2.35 inches, and a depth of cut of approximately 3/4 inch, the dimensions are calculated to make the drill fit your tool and provide ideal grip during use. This drywall cutting tool is made from M2 high speed steel for excellent durability and long lasting use even in demanding cutting applications. The drywall drill cuts up to 3/4 inch deep and the wood drill cuts up to 1 inch deep; this makes it more versatile and provides excellent control and precision in every cut. Whether it's for DIY woodworking, drywall repairs, construction tasks or simple detailing projects around the house, this drywall cutting drill kit has you covered; it works smoothly on a wide variety of materials such as wood, plastic, and gypsum boards These bits are not only for cutting drywall, but can also cut through a variety of materials including acoustic tiles and formwork; it's also ideal for cutting around outlet boxes, framing or shielded lights. Colour:As Shown Material:Metal Package Contents: 1set * drywall cutting bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.