The RJ45/RJ12/RJ11 Medium-Duty Crimp Tool can be used for terminating a RJ45 plug with a stranded, four-pair, unshielded, twisted-pair cable, making a patch cable assembly. It can also be used for terminating a RJ12 or RJ11 plug with a three-pair or two-pair, unshielded phone cable. PRODUCT FEATURES: Allows you to terminate a stranded data cable or voice patch cable; Crimps RJ45, RJ12, and RJ11 plugs; Lets you crimp, cut, and strip with one handy tool; Sizes patch cords to the exact length you need.