The Edge Duraboard 100/100 Grit File (x 10) is a coarse file ideal for removing acrylic, gel and fibreglass overlays. It is a washable, cushioned file providing a better grip, allowing for more control and faster refinement. Cleaning Instructions: Put nail file under running water and brush the grit surfaces lightly. Do not leave immersed under water for more than 10 minutes. Pat dry and allow to air dry for 24 hours before re-use. Also available in singles.