15 Count Pinch-Edge sets
15 count medium jugs designed so they just fit in a USPS Small Flat Rate Box. Bolts supplied 3/8" by 1-1/2" flat head cap screw.

Each set $35 and $10 shipping (USPS SFRB).
15 Incut Pinch Set - rather positive pinch holds
15 Very Incut Pinch Set - incut enough to use on very steep walls if you are strong.