The number one choice of insulated staple for professional telecom installers, the T59 is made for fastening low voltage wires and communication cables without damaging sensitive communication wires. Perfect for computer, CAT5/CAT6, RG6/RG9, COAX and phone cables, these staples can be used on any data, video or communications wires up to 5/16 in. The insulators come in clear or black to match the wires being fastened. Proudly made in the USA.