The Tork Craft Router Bit 1/2" Shank Set, for hard and softwood, sealed ball bearing provides smooth cutting of timbers. 12 Piece set of 1/2" shank tungsten carbide tipped router bits, buts can be resharpened. All bits can cut hardwood, medium density fireboards, and chipboard. Convenient, secure storage, and carry case. Hard / Soft Wood Sealed Bearings Tungsten Carbide Tipped All bits can be resharpened Convenient, secure storage and carry case