Carr Lane CL-300-RBH | 3 Size x 5/16-18" Thread Revolving Ball HandlePhenolic Revolving handle with a ball knob made of phenolic plastic and a threaded steel spindle. This version is especially useful for hand wheels or cranks mounted horizontally with the handle used as a hand rest. Revolving Ball Handles have an internal bearing that allows the handle to remain fixed in your hand, for firm gripping. Material Item Material Heat Treat Finish DFARS RoHS Ball Knob Black phenolic plastic (glossy smooth finish, extremely