A simple clamp set which can be located in holes either in a bench top or in separate timber beams to provide a means of assembling multi-board panels. A second timber bar can be positioned on the opposite pins of the clamping blocks to stiffen up the whole assembly. The clamps are usually used in pairs for shorter timber lengths and three, or even more, when clamping longer lengths. The removable handle keeps the work area clear once the clamps have been tightened up.