Upgraded Tungsten Carbide Blades - Sharp and wear-resistant, can withstand high temperatures. external chamfering tool is made of materials such as carbide steel. Ensures longer service life and improved cutting efficiency compared to similar products Metal deburring tool has a hex shank diameter (1/4 inch) and a working diameter range to fit 1/8 inch(3mm) to 3/4 inch(20mm). Operates with full lubrication at speeds below 500 RPM Efficient and Safe Operation - Easily shaves down the outer edges of a screw/bolt/pipe/rod and remove the burr. Quickly repairs bolts and tightens the nuts in place without hurting your hand. No sparks, and no burns. Simplifies the screw thread repair process Suitable for use on a wide range of materials including stainless steel, copper, brass, aluminium, wood and hard plastics, making it a versatile metal deburring tool Put the bit over the screws/bolts first, Start with the lowest speed, slightly Apply pressure to remove the burr and Increase the speed as needed. Do not turn on the driver until the bit fully covers the screw/bolt. Otherwise, the bit would bump over the screws/bolts and become hard to control Colour:As Shown Material:Metal Package Contents: 1 set * chamfer tool 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.