For securing EV charging cables between 16-21mm diameters, each pack contains 1x SDS Drill Bit, 20x fire-rated screws for masonry, concrete & brickwork; with no wall-plug required. The 20x black Clips are produced from fire-rated & pliable steel, which can adjust to different cable diameters by a tight wrap & lock mechanism that gives installations a perfect finish.- Adjustable for 16-22mm cable diameters- Labour saving wrap & lock saddle- Tight fitment, stylish design. No visible screw- Secure screw-fix, no wall plug required- Handy packs, bagged c/w clips, screws & drill-bit- Screws supplied- Drill bit supplied