Snap In Pin - 3/8: CAT NO. 209633
the 3/8" Snap In Pin fits all Super Mafer Clamps. 3/8" diameter is not too common for rigging...yet. You can attach a lightweight MSE Grip Head to it, and some light weight lights the are designed specifically for 3/8. If you are in doubt, use the standard 5/8" Spud.