3" metal and resin hybrid #200 grit grinding pads with hook and loop backing for polishing and smoothing scratch patterns. Hybrid bond tooling is much more effective at removing scratch marks left by metal bond grinding agent, lasting significantly longer than equivalent resin bonds. They are the ideal choices for grinding and honing work on concrete and other natural stone. Usable both wet or dry. 3" metal and resin hybrid grinding pads with hook and loop backing for polishing and smoothing scratch patterns. Hybrid bond tooling is much more effective at removing scratch marks left by metal bond grinding agent, lasting significantly longer than equivalent resin bonds. They are the ideal choices for grinding and honing work on concrete and other natural stones. #200 grit, comes in a set of 3 pads, use wet or dry with floor grinding machines with velcro attachment.