Jw winco – 7117021 – plastic solid disk handwheel w/retractable handle 9.84″ dia x .24″ pilot hole these disk handwheels with retractable handle are distinguished by modern designs. An excellent choice for light-medium duty applications. In the operating position, the handle is secured in the engaged position. To fold it down, it is drawn out from the engaged position. A compression spring secures the handle in either position. Maximum heat resistance of phenolic plastic: 150c (300f).