Diablo's game changing Carbide Specialty Key Hole Bits deliver the best performance in mounting frames, shelves, storage racks and other work pieces flush against the wall. This high performance TiCo™ Hi-Density carbide bit bores notches, grooves and slots into wood, laminates and other materials so screws and nails have something to latch onto. Transform your CNC, automatic, hand-held & table-mounted portable routers into a productivity machine.