The HART 7-Piece Assorted Router Bit Set is ideal for smooth edges on all your woodworking projects. Each bit features a carbide-tipped edge for ultimate durability and a smooth finish. This set includes ¼” Straight bit, 3/8” Straight bit, ½” Straight bit, 5/8” Straight bit, ¼” Roundover Bit, 3/8” Roundover Bit, and 5/32” Roman Ogee bit with a protective, customizable case. These router bits are compatible with ¼” Routers and have a max RPM of 30,000. For best results, let the bit and router do the work and don't force the speed of cutting.