Secure your expensive computer equipment and save stored data from complete loss. These blocks combine two major components not available in over-the-counter industrial Velcro products: One is an oversized cushion pad to offset the feet of your equipment and raise the level up by 5/8" to allow your equipment to vent and move with motion not against it. The second is ridged arrowhead gripping barbs which are the "hook" that grabs the loop. Secured with a simple peel & press application at the base, the blocks are hidden from view. Recommended as a helpful theft deterrent, they are non-damaging to finished furniture and equipment. Great for RV"s and Boasts. Each box contains 8 blocks which is enough for 2 items. .