[ 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 [ increase the service life of the drill] The when you forgot to manually find the angle or accidentally make the tool edge thinner. the utilization rate of drill bits and solve the you when buying drill bits [Grinding Wheel Angle Adjustable] The drill can be rotated to grind the drill at a larger angle. Screw positioning angle, stable grinding process [ and efficient] A 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 bits , 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 . The measurement allowed is +/- 1-3cm.