I used several of these in construction of my timber frame projects. They are handy since you can configure with additional pipe to make longer clamps. If you want them for woodworking, you might want to look at the Bessey version which has some nice features for use in a wood shop Pony clamps are made in the USA and designed to be used on standard 3/4" or 1/2" black pipe to offer the flexibility of creating any clamping length. Easy to assemble, ideal for a wide range of applications from industrial to do-it-yourself type projects.
* Both sets incorporate standard Acme cut steel threaded screws for a securing hold and final tightening
* Tail-stop features a multiple-disc-clutch for fast easy adjustments while holding work securely
* Sets include one each head and tail units

from $12.99