Designed to be used with ordinary 3/4" pipe to create any clamping length for a wide variety of woodworking projects. The 3/4" pipe clamp fixtures feature a wide base for even more stability than your average pipe clamp. This works especially well when gluing up larger panels. The clamp also has a spring action ratchet to make adjusting the clamping width easy and quick. This set also features 4 SILI™ Pads which are made from a silicone rubber material. The silicone material keeps wood glue from sticking to the pads which means you can clean the pads with warm water or you can let the wood glue dry and peel the glue right off!