The Conical Round bit is a 2-in-1 Diamond Prep Bit featuring a medium grit and a round-topped surface that's perfect for cleaning up cuticle, the nail plate, and removing callused skin around the side walls. This versatile drill bit is the perfect tool to gently and safely remove cuticle without cutting or hurting your client, and is also used to clean and seal the cuticle after product application!
More info:

Diamond Bit
Medium Grit
Standard shank size 3/32" (fits all professional nail e-files)