Our Resin Drill Polishing Kit included 1 deburring knife, 1 rotary pen, 5 drill bits(0.8,1.0,1.4,1.6,2.0), 5 diamond polishing bits, 5 sanding bits; 5 buffing bits; 2 polishing stick; 90pcs key chains accessories. Mini rotary pen equips with qualify motor,textured aluminum pen body,Non-slip grip. Powered by USB recharging,it can use 30 minutes after full charging. You can adjust speed from 5000rpm, 10000rpm to 18000rpm to suitable for different material you need to work. Our deburring tool are made of aluminum handle, blade are made of high-speed steel.The deburring tool is very easy to work on removing resin outside edge or burrs. Use rotary pen with drilling bits or diamond bits to drill hole on resin,then insert the hole with screw eye pins,hang it with chains to get your favorite keychain. All the diamond bits,sanding bits, buffing bits,sanding stick can use in resin polishing.Use rotary pen with bits to polish can save your energy and make work easily. Color:As Shown Material:Metal Package Contents: 1set * resin jewelry making kit 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.