Bar Sash Clamps
Sash clamps are used to clamp work together when it is glued. When in use, the sash clamp is placed below the work to be glued / assembled. The slides are arranged on either side and scrap wood is placed between each face and the work. This protects the work when the thread is tightened.
If you are making table-tops, assembling casework, making glue-lam boards or laminated beams, these clamps are just the thing for exact and secure glue jobs.