Introducing The Universal Fence Clamps by POWERTEC. These compact, yet lightweight clamps are designed to fit and secure a wide variety of shop made auxiliary fences (from 3/4" to 5-3/4 inches thick), while preventing interference of other accessories while you work. Perfect for your everyday woodworking needs, they work well with table saws, router fences, and drill press tables.【High Precision Design for Professional Results】 The clamp features a pin (arm) conveniently designed to fit into a standard 3/8" hole drilled in the top of the auxiliary or sacrificial fence. Thoroughly tested for a precise fit, the clamp arm/pin is formed at 85 degrees (instead of 90 degrees) to help pull the auxiliary fence, tight against the fence. This is important during the tightening phase to allow the board to be pulled firmly against the fence, offering just enough joint flexibility. Additionally, the clamp was crafted with an application layout that keeps it out of the way, clear from your existing attachments. It's practical design reduces the need for wood screws, bulky clamping options and undesirable results. In many cases, the clamp's arrangement improves workflow by eliminating time spent adjusting or maneuvering jigs and fittings.