Keyhole Router Bit Set- 1/4 Inch Shank Router Bits?5 Pcs Router Bit Set 5/16 3/8 TOOLDO keyhole cutter set with C2 carbide inserts, high quality alloy inserts with high finish and long service life The Keyhole Router Bit Set features a solid hardened steel body and anti-recoil design. The blade is sharper and can be trimmed and polished for a very clean cut Designed for handheld and desktop routers, not for power drills and rigs 5-piece router bit set provides more variety of T-slots or keyhole slots The router bit set is suitable for solid wood, particleboard, MDF, plywood and more.