PONY-JORGENSEN - USA MADE
Item E6291 takes 1/2 inch pipe (NOT INCLUDED) - Tommy Bar adjustment
Item E6292 and E6293 take 3/4 inch pipe (NOT INCLUDED) - Crank handle adjustment
Pipe clamps are the most adaptable of sash clamps because 3/4 inch pipe is still availablen in many lengths from hardware stores, is relatively affordable and sufficiently strong and rigid for most glue up needs.
The tail has a continuous, quick multi-plate clutch for rapid adjustment.