PUSH KNIFE™ SetPUSH KNIFE™ is a machined aluminum hand tool designed to remove quarter glasses utilizing Torpido Express® Blades. PUSH KNIFE features a rectangular plate for striking with a rubber mallet, enabling power from the mallet to be transferred to the blade and through the urethane.Torpido blades can be easily changed out by unscrewing the hinged plate that locks the blade in place.Includes all three sizes.15″/ 24″/ 33″