PANA Flat Top Drill Bit is known for it's simplicity to cut, shorten, backfill and shape the nail. However, be careful of the cuticles, as the sharp edges may cut into the client's skin. The drill bit has two barrel size options to help tackle surface areas, such as large barrels for larger areas, and small barrels for smaller areas. It should also be noted that this Flat Top Drill Bit fits 3/32" shanks only. PANA Flat Top Drill Bits has three different color variations such as silver, gold and the diamond-like carbon coating that lasts three times longer, DLC black.