1 In. insulated cable staples are designed for use in the DeWalt DCN701 20V MAX Cordless Cable Stapler. They are UL (Underwriter's Laboratories) listed (406A) for common Romex (NM Sheathed Cable), and MC (Metal Clad) cable applications. The staple crown is plastic insulated and these fasteners adhere to the National Electrical Code. These staples can also be driven manually using a hammer for tight space applications. 540 staples per box.