Introducing KnifeTucker, the ultimate tucking tool for wrappers and graphic installers. This revolutionary USA-made tool is endorsed by 3M and patent pending for its innovative design. The KnifeTucker replaces the traditional clip on all industry standard knives, making tucking film easier and more precise. Say goodbye to searching for your tuck tool and hello to a more efficient wrapping process with the KnifeTucker - the best tucking experience. KnifeTuckers per container: NINJA - Qty. 4 PROKNIFE - Qty. 4 OL/RD - Qty. 4* NT-CARTRIDGE - Qty. 2 * The OL/RD KnifeTuckers specifically fit the metal knives with black slides