Introduced to the market in 1979, Rexnord Tollok Locking Assemblies offer a wide variety of configurations. In addition to our standard Locking Assemblies, Rexnord also offers Shrink Discs, a style that clamps the equipment by using compressive force over diameter of the equipment to the shaft. With over 40 years of innovation, know-how and operational excellence, we have the right configuration for your application.