Abstract: A workpiece clamp comprising an upstanding pillar (30, 32) having two relatively movable workpiece engaging jaws (34, 36, 42, 44) extending from, and carried by the upper end of the pillar. A drive (74) for effecting the movement of the jaws is located remote from the pillar and thrust transmitting means (54, 56, 62, 66) extends between the drive and one or both of the jaws, to effect relative movement between it and the other. The drive transmitting means may comprise a rigid thrust transmitting member such as a rod or lever, or a flexible sheathed cable, a sheathed rod or an exposed rod, a chain or a set of levers operatively connected one to the other, or any combination thereof.