If you are buying 40' or 24's you might want to consider buying the Bessey cabinet door clamp kit. The price for the qty of 2- 24 inch clamps, and the qty of 2-40 inch clamps go for less money in the kit, than they do individually, and you get the supports that hold up the clamps for free-no extra charge. Since clamp buying is a hobby with these, you may want to load up that way instead. These Bessey clamps take top honors in strength, weight, and ease of use. Definitely a top quality product. Every show including Norm, Woodworks, etc. all sport Bessey clamps. They are the best! Now let's get into the Nitty Gritty.