Dremel 512E EZ Lock 320 Grit Abrasive Buffs. Package includes two 320 grit finishing abrasive buffs. Use with either Dremel EZ402 EZ Lock Mandrel or Dremel 402 1/16 inch screw mandrel, which are not included. Measures about 1/2 x 1 inch. For use with Dremel Rotary tools.