A metal half-moon file handle supplied with twenty 100/180 grit paper refills. 100/180 is the everyday working pair: 100 shapes and takes length down, 180 refines the edge afterwards.
Why a metal core
The handle stays, the abrasive goes in the bin after the client. That is the hygiene argument for this system over disposable card files: the part that touches the nail is single use, but the handle can be properly disinfected between clients, which a card file never can. It also stops you throwing away a whole file to change grit.
