SurfPrep 5" Backup Pads Manufacturer: SurfPrep Part #: SPBP5PSA Description: SurfPrep Backup Pads come in a variety of options depending on the products you are using as well as the surface you're sanding. Pkg qty: 1. Hook & Loop Backup Pads are made with smaller 'hooks' which are excellent for the ‘quick release’ of SurfPrep Foam abrasives. J-Hook Backup Pads have a longer hook design that works well with SurfPrep Pad Savers, Interface Pads, Film, Paper, & Non-Woven Discs/Pads. PSA are meant to be used with 'Pressure Sensitive Adhesive (sticky) backed abrasives for flat sanding. To be used with SurfPrep 5" Sanders. 5" Backup Pads Hook & Loop, J-Hook & Loop, & Pressure Sensitive Adhesive (PSA), Thread 5/16-24. Literature: FAQ View Full SurfPrep Catalog