Western Gear SpeedFlex Press Knobs. Roller Adjusting Knobs off a SpeedFlex Press. They are the Larger of the Knobs for the Press, I have Smaller ones for sale in another listing. Polished Metal knobs, not Chrome Plated. Measure 4.250″ across the face, the collar is 1.500″ and the mounting hole is. 625 drilled for a. 250 Pin and come with a Set Screw. One Knob has a Bronze Bushing in the mounting hole with the Part #8718-450 engraved on it. Knobs weigh in around 1lb. Or 760 grams each. Black Paint on the front of these is in pretty good condition. These mount on a. Press Tag not included, shown only for press information.