[ stability] There are multiple positioning screws in the drill bit, which are used to fix the position of the drill bit, which frees both hands during the grinding process and guarantees safety [Easily increase the service life of the drill] The when you forgot to manually find the or accidentally make the tool edge thinner. the utilization rate of drill and solve the you encounter when buying drill [Grinding Wheel Adjustable] The drill can be rotated to grind the drill at a larger . Screw positioning , stable grinding process [ and efficient] A compact and portable drill bit sharpening tool. This drill bit sharpening tool can be used with an electric drill to keep the bit sharp and for use. [Top material] Made of high-quality plastic and metal, it has high hardness, rust resistance, sturdiness and durability. It can grind iron drill , durable and not easy to damage. Fits 1/4 inch (6.35 mm) Material:Metal + plastic colour:Black Package Contents: 1 x drill sharpener 2 x grinding wheels 1 x screwdriver 1 x wrench Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.