Professional woodworking assembly table. The clamping arm on the Castle USA AT-Race 4′ x 8′ Face Frame Assembly Table glides smoothly on an open beam that allows face frames to extend beyond the top of the table. The redesigned quick-clamps feature dual handles and centered activation for easy clamping from either direction. The rigid steel arm, constructed out of Unistrut, will stand up to years of use, while the Open Back table gives you more work area and can handle oversize frames without taking up valuable shop space.