For more than 30 years, R-Series clutches have been the market leader when it comes to reliability, dependability and strength. Rollease Acmeda pioneered the R-Series clutch in 1982 and no one has been able to beat it since. The R-Series clutch is ideal for handling commercial applications or large weights and lives up to heavy usage time and time again. Our proprietary spring mechanism creates an easy pull for a smooth, uninterrupted lifting of window coverings.