Disc-O-Torque® fluid actuated multiple disc clutches have provided thoroughly proven, dependable hydraulic and pneumatic clutches for over 25 years. All clutches are self-contained and require no linkages, levers or adjusting devices. The D5(HTH), D3(STH) and D2(STD) models require no rotating unions, glands, or rifle drilling. Wave springs provide fast, positive disc separation for minimum idling resistance, and they provide uniform torque capacity during their predictable long life.