This Glardon Vallorbe file holder is designed to hold any 2mm square or pillar ceramic fiber files, providing a secure grip on the file as you work. The holder features a slender, tapered fingertip grip that prevents slipping and gives you precise control as you work. Set the file on the holder surface and slide it forward through the two collars with the desire working length exposed at the tip of the holder. Then push the front collars forward until the file is firmly secured in place. To remove or adjust the file, slide the forward collar back to release the file and slide the file as needed.