Metal tool that is about three inches wide and looks like a chizel. Used to crease carpet under the nose of a step and at the bottom of the raiser before tacking the carpet down with a staple gun. Often used with a hammer to crease thicker carpets. Also used to tuck edges of the carpet under the base-board during carpet installations in rooms.
carpet installer 1: "pass me the stair tool so I can start on the stairs."
carpet installer 2: "Que? No comprendo, como se dice en espanol?"