Biscuit jointers (also know as plate joiners) are designed to create perfect joints in all types of wood, plywood, and chipboard, quickly and easily. Using a tungsten carbide tipped grooving cutter, with a plunging motion they cut crescent shaped slots into both surfaces being jointed. Wooden biscuits are then glued into the slots, aligning, strengthening, and creating a perfect strong joint. All have vertical adjustment and fence alignment, dust collection bag or adaptor. Industrial models are available in 110 Volt or 240 Volt.