Buyers Products K90 Series Power Take Off/Hoist Control Valve operates pneumatic truck functions with the simplicity of a single lever. It's built to perform with a design that allows for controlled lowering (feathering) and smoother operation. Built-in safety features vary by style and help reduce operator error. All valves have a control pad indicator light that warns of PTO engagement. The K90 has automatic disengagement of the PTO in lower setting, while the K90D has a "dead man" control on the hoist lever, which returns to neutral position and stops motion when user engagement is not present.