Roundover bits with two replaceable knives fixed by special Torx screws. The blades are 2 sided profiled and give high economy of your work with laminates. Roundover bits type are equipped with the ball bearing guides. For precision work on laminates. Radius 2mm (5/64") or 3mm (1/8") is for rounded 2mm (5/64") or 3mm (1/8") ABS edges. Radius 5mm (13/64") is for quick rounded edges in hard wood or MDF. For use on portable Routers.