7mm Cable Clips - Nail in 50 Pack The 50 Pack of Nail-in Clips provide a simple and inexpensive way to route cables in the home office or commercial space. They have a 12mm nail made of steel that can more→penetrate the majority of surfaces but may not be able to be used on very hard brick. Perfect for plasterboard wood and even breeze block. Specification: 7mm diameter cable clip 50 Pack 12mm nail depth