I ordered these to help me sand some moldings and cases that had too much paint on them. Attaching sticky sandpaper to these grips makes the tedious job a lot easier, and they conform to many popular casting profiles. Without them, your fingers tend to cramp. Although the profile size is listed on each grip, I've made markings for each size to make them easier to see at a glance. This will make your sanding job a lot easier.