D-Line Safe-D T&E Grip Clips are user-friendly by a symmetrical design that makes it easy to hold the clip over T&E cable during installation. Grip Clips include flat-head nails with 2.5mm diameter shafts that enable effective knock-in to mortar and wood; compared to alternative designs with thinner nails, the 2.5mm shaft minimises the risk of a nail bending or buckling in hard substrates.