The Gardner Bender Cable Boss Staple Gun is a professional grade cable staple gun able to secure both 120V and low-volt cable from the same tool. A reversible cable guide designed into the tool accommodates 3 sizes of Cable Boss staples, 5/16 in, 3/8 in and 1/2in. Simply select the staple size, insert the guide with the proper staple side "out" and the staple guide ensures full insertion of the staple into the wood without damage to the cable insulation on round and flat NM, Coax, Voice/Data and Low Volt cable. This tool features rugged construction able to survive a 10 ft drop and an ergonomic handle design with comfort grip areas for 2-handed operation and a bonus rear guide for added cable control to reduce cable twisting during installation. The easy trigger force and lever action requires 55 pounds of pressure and a flat surface to ensure optimal staple installation. An integrated staple refill window to view remaining staples makes it easy to see how many staples remain in the unit before you head over to the job. If you need to install long cable runs over numerous studs you'll love the time and effort you save using this gun instead of a hammer. Applications include: Cat 5, Speaker Wire: 16/2, 16/4 and 12/2, Security Wire: 18/4, Thermostat wire: 18/7, NM Cable: 14/2, 14/3, 12/2, 12/3, 10/2 Coax: RG-6 and RG-6 Quad Shield, Voice Data: CAT 6, and Structured Cabling: 2:CAT 5, 1: CAT 5 and 1:16/4 Speaker Wire Gun designed to work with the following GB Staples Model #s: MPS-2080 5/16 in Metal Insulated Staple in Blue (250-Pack), MPS-2100 3/8 in Metal Insulated Staples in White (200-Pack) and #MPS-2125 1/2 in Metal Insulated Staples in Black, (200-Pack) Staple gun is red with black grips and molding.