Replacement Knob for UGS Bench Grinder Shields

Part Numbers: ATS-AH5:   Replacement Plastic thumb knob lever for ATS UGS-1 bench grinder shield arm assembly, 1/4"-20 thread, Each.  $2.95 ATS-AH6:  Replacement Plastic thumb knob lever for ATS UGS-2 bench grinder shield arm assembly, 5/16"-18 thread, Each.  $2.95 Features Two Arm Knob, Vibration-Resistant, Polypropylene.  Sold per each. Two sizes: ATS-AH5 (UGS-1) is 1/4"-20 thread.  ATS-AH6 (UGS-2) is 5/16"-18 thread