Abstract: An improved tool for tensioning and severing a cable tie used in connection with a remote pneumatic power supply is disclosed. The tool comprises a housing having a gripping portion and a barrel portion, with barrel portion having a front section and a rear section. A nosepiece is located on the front section of the barrel portion, and the nosepiece has a cable tie entrance having a lower edge and an upper edge having a predetermined sharpness that assists in severing a cable tie. A blade located in the nosepiece cooperates with the sharpened edge to sever the cable tie. The cable tie tensioning tool may have an overhead or underside fitting for communication with the pneumatic power supply. An improved hook that interacts with a spring-loaded pin helps in hanging an orientating the tool. An oversized flange located on the nosepiece assists in feeding a cable tie into the tool.