These Arrow Fastener Co. 721168HW 31/64" T72 Hardwood Insulated Staples are best used with the large wire and cable tacker and intended for harder wood. They are insulated and each box contains 300. These hardwood staples can be used for projects at home such as remodeling and do it yourself projects. They are also ideal for professionals on the job as well. The staples can be used on non-metallic sheathed cables and are easily attached to other cables.