This 4 lobbed aluminum hand knob is manufactured from the highest quality aluminum, and is designed to meet the requirements of even the most demanding industrial applications. The 4 lobe design of this hand knob (also known as a clamping knob) ensures positive palm and finger grip, each and every time. Available in a clear anodized finish, and features a blank hub with centering spot. Contact one of our sales engineers concerning specialty bores, taps and set screws. Inch and metric versions available.