A Bar Clamp and obstruction free Guide Fence for sawing, routing, etc.* Dead Straight & Flat...Perfect for Glue-Ups.* Smooth Quick Action one hand operation clamp. * Lightweight Aluminum Extrusion is straight, flat, and strong. * Virtually eliminates side to side movement common in other clamps. * 2 Accessory T-Tracks are milled into the top surface of each side the clamp. * Measuring Rule is centrally mounted on top surface of the clamp. * Ability to create “back-to-back” clamp relationship with the clamps either vertically or side-by-side. * Fully adjustable from 0" to total clamp capacity. * Clamp mechanism is heat treated steel, for long wear and positive clamping action. * Square face jaws are made of high impact unbreakable ABS.