Premium Knob Premium Knob: Superior design provides multidirectional protection, ideal for the demands of medium to high traffic areas. Thickness: 3/8 in. (9.5 mm); Total weight: 2.16 kg (0.44 lbs.); Warranty: 3 year. Back Share this: Click to share on X (Opens in new window) X Click to share on Facebook (Opens in new window) Facebook Like Loading...