We sold the rack so no longer need these weight pegs, these are for change plates mostly 5 lbs and under but will take some 10's, we used it on Titan T3 but I believe it can be used on any 2x3 rack or 3x3 rack. We uses 5/8 bolts but holes are big so it should take 1" hardware also
These cost close to 300 after tax and shipping so 80 is a steal
All info is here:
https://www.sorinex.com/products/split-change-plate-utility-pin?Options=Split+Change+Plate+Urethane+Utility+Pin
Pickup in El Sobrante
If you see this it's still available