Quick-Grip bar clamp racks, space efficient flat-on-wall storage

Hanging Quick-Grip bar clamps off off a towel bar or clamping them to a shelf was inconvenient, and a poor use of space, so I designed these racks.   In them, clamps are securely held 5-deep, and by having the clamps open be different amounts the grips can fit between each other.  So I can put 15 clamps on each rack.

One rack is designed with three slots for any combination of 6" and 12" clamps that have a 3" throat depth.  The other has a middle slot for the larger 24" clamps that have a 3.5" throat depth and two outer slots for 6" and/or 12" clamps.

As the photos show, I have storage for 30 clamps on 30" of wall.