This48 Piece Kit Includes Satin & Medium Satin Finish Buffs Jewelry Polishing Tools 24Satin Finish Buffs Great For Polishing Jewelry This is a new set of 24 3/4" (19 mm) satin finish buffs These are great for polishing jewelry and dentures These buffs are for use at speeds of up to 30,000 Rpm Each shank measures approximately 3/32" (2.4 mm) in diameter 24Medium Satin Finish Buffs Great For Polishing Jewelry This is a new set of 24 3/4" (19 mm) medium satin finish buffs These are great for polishing jewelry and dentures These buffs are for use at speeds of up to 30,000 Rpm Each shank measures approximately 3/32" (2.4 mm) in diameter