Jw winco – 6381015 – plastic solid disk handwheel w/retractable handle 6.30″ dia x .24″ pilot hole these thermoplastic handwheels with revolving retractable handles are distinguished by their modern design. By pulling up on the handle 90, the handle locks into the rotating position. Disengage the handle by pulling it out and moving it down 90 back to the center of the handwheel. A compression spring secures the handle in either position. These handwheels are an excellent choice for applications requiring the handle to be kept out of harms way. Maximum heat resistance of nylon plastic: 110c (230f).