How do you drill square holes? With a mortiser! This specially designed, drill press-type machines use a drill bit housed inside of a square chisel to perform this feat. The drill bit starts boring a hole in your wood, then immediately the square chisel follows – forming the square shape, while its interior bevel forces the excess wood that is remaining in the corner sections into the spinning drill bit. The drill’s flutes then carry away the cut chips up and out of the mortise. All this is done in seconds, permitting you to cut accurate mortises for furniture, cabinetry, doors, shutters and more. RIKON’s Benchtop Mortisers is wired for use with 3-wire 120V electrical receptacles.