Standard hook and loop fastening systems, often referred to as Velcro, consist of a hook (stiff plastic side), and a loop (softer fuzzy side), that when paired, create a fastening system.
The J-Hook and loop does the same but, the J-Hook is a longer hook with a J-shaped curve at the end for a stronger connection. Both work on the same basic premise.
Excessive heat created from friction when sanding can melt the plastic hook part of the system and make it ineffective. This is caused by applying too much downward pressure on the tool when sanding or, by keeping the sander in one spot too long. If this happens, you will most likely see it occur on the corners of your RFBP (Red Foam Backup Pad) first. When the area of the damaged hooks on your sanding pad increases, your abrasives will not stay firmly attached to your RFBP and it should be replaced.
