This special clamp allows you to have one sku on your truck to hold almost any cable in place. Works on 3mm Fiber, 22/4 all the way up to 14/3 power cords! Angled hole design allows it to bite better in sheetrock without an anchor and also to be used in confined spaces. Simply use a short drywall screw, pre-mount it 90% of the way in, slide the cable in, then tighten while squeezing the two halves together. Does not damage the wire. Can be reused over and over. This type of fastener also allows you to pull more slack on the cable should it be too short without having to remove and re-install new fasteners all over again. Quantity of 10 per package.