Usage Tips:10mm triangular shaft and 6mm round shaft which can applied to most electric drills for your different work requirements. This adapter turns your electric drill from a simple punching tool into a multi-functional grinding machine tool. Easy to use, just insert the conversion shaft into the chuck, then tighten the black and silver pressure plate with wrench. Perfect drill to grinder conversion kit for surface sanding, wood cutting, jade grinding, furniture polishing, metal rust removing, ect. Made of good quality hard metal, high-temperature resistance, sturdy and durable, wear resistance. Please Note:Please take protective measures before use. Please make sure that the pressure plate is not loose to prevent cutting pieces from flying out. Material:Metal colour:silver+gold Package Contents: 1 * 6mm Round Shaft 1 * 10mm Triangular Shaft 3 Set * Angle Grinder Flange Nuts 2 * Angle Grinder Only the above package content, other products are not included. Note: Light shooting 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.