Figure 740 Grinnell® Rapid Installation Pivot-Bolt (GRIP) Rigid Couplings are a proven, dependable, and more efficient method of joining pipe than standard couplings. Simply push the gasket onto the pipe, swing the coupling body over the gasket, and tighten only one bolt. In comparison with other installation-ready couplings, the Figure 740 GRIP Coupling allows clear visual confirmation that the gasket is properly seated on the gasket sealing surfaces.