FenceClamps? allow you to secure a wide variety of shop-made auxiliary fences to your existing fences without the clamp getting in the way. The clamp arm simply fits into a 3/8? hole in the top of the auxiliary fence, preventing interference while you work. Clamps can be used in pairs for sacrificial fences, half-fences, and resaw fences, individually as stop blocks, and in many other fixtures.FenceClamp Features: Fits into a 3/8? hole in the top of the auxiliary fence Steel threaded components with rigid aluminum body Range of travel 1/2?-5-3/4? (12mm to 146mm)FenceClamps can be Used With: Table saws Router tables Miter saws Framing Squares And more