Dual-purpose clamp and rail. Clamp across boards for firm straight edge to guide jigsaw, router or circular saw. Can also be used to provide light pressure whilst gluing multi-panel boards. Clamps can be bolted back to back to secure to workbench for hands-free use. Dual-purpose clamp and rail. Clamp across boards for firm straight edge to guide jigsaw, router or circular saw. Can also be used to provide light pressure whilst gluing multi-panel boards. Clamps can be bolted back to back to secure to workbench for hands-free use.