For accurate guiding of routers, saws, and jigsaws. Integral clamping jaws and a locking lever provide a quick way of clamping the guide batten. Sliding lock can be used one handed and holds perfectly in place. Easy to adjust to allow flexibility when working. Robust and rigid construction provides straight and accurate guiding and extended life. Integrated locking lever provides quick and easy clamping and releasing action. 50 Clamp guide will clampa 4ft board.