These heavy-duty staples are designed for safe and secure installation of coax and CAT3/5e and CAT6/6A data cables up to 5/16 in width. For exclusive use with Klein® loose cable stapler. These UL listed insulated staples are available in packs of 300. Klein® 450-002 Staples Insulated, Steel and Plastic, 5/16 in x 5/16 in, 27 ga