Glue-Up Joint Bridges help eliminate the stress with panel glueups and bring twisted, bowed, or cupped boards level with each other during complicated glue-ups. Simply clamp a Glue-Up Joint Bridge above and below a joint with the arch centered over the joint, apply a clamp, and the joint will come into alignment. Made from nearly indestructible nylon-reinforced polycarbonate, they will not break or crack under extreme pressure. These bridges won't mar your work, and dried glue can be easily knocked off. They feature a 5/16” wide by 1-3/8” deep groove down the middle to straddle clamp bars. Each bridge measures 4-1/4” long by 1-13/16” wide by 1-9/16” high. Sold in sets of four.