Please see the picture and let us know which part you are needing.
SOA128 - Set screw to hold post tight (#1)
SOA129 - Stainless Steel pin with micro set screw (#2)
SOA130 - Set screw to hold post tight (#3)
SOA131 - Swivel Adapter Knob (#4)
Please give us a call to order, 877-778-6937.
Thank you,