Simply remove the old worn file from the existing plastic cap and replace with these peel-n-stick files. Reliable adhesive backing will keep the file in place no matter how fast your pedicure machine spins until you are ready to remove it and replace it. DOES NOT INCLUDE ANY PLASTIC ROUND CAPS. Fits TAIFF Soft Feet, Luxor Tip2Toe, and Peditric Callus Remover Pedicure Machines.