For safe tenoning and coping operations. This unit firmly clamps your timber for end grain cutting on router tables and shaper tables. It utilises a moveable fence and three hold-down clamps to immobilise the work piece that is being cut. The sled then rests against the router shaper fences by way of a perspex shield that guides the sled across the cutter. Router shaper fence must be at least 95mm high for the perspex guide to run on. If your fence is lower than this, simply screw a riser board onto the side of your fence.