ROBERTS Cut and Jam Knife for cutting and tucking carpet is a favorite tool of carpet installers. It is uniquely designed to serve a double function: To cut carpet with one end and tuck carpet into gullies with the other end. Designed to easily open to change the blade, it includes safety thumb and blade guards. This rugged knife made of die cast aluminum, is lightweight, molded to fit in your hand, and includes a slip-resistant handle that assures a firm grip to cut with precision. The handle stores up to 10 additional heavy-duty slotted blades.