Overview Reviews Product Description 3W-01-22 Challenger Knob for SA10 Lift. 30mm diameter ball. Screws into 3W-01-17 lever. 3W0122 Product Videos Custom Field Product Reviews Write a Review Write a Review × Challenger 3W-01-22 Challenger Knob for SA10 Lift Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *