B5-HH Auto-Pro Horizontal T-Track Clamp is fitted with a 5/16" T-Bolt that inserts and tightens into most 5/16" T-Track. Clamp rotates 360 degrees, allowing for a wide range of clamping applications. Eliminates the need for constant readjustment and enables the clamp to maintain clamping pressure regardless of material thickness. Spindle adjusts horizontally and vertically to apply consistent pressure over a range of material thicknesses. The integrated clamping adjustment screw is used to create a wide range of clamping pressures, 25-150 lbs. Rotate the screw clockwise to decrease the pressure and counterclockwise to increase it. To engage clamp, set push bar against material and press down on the handle. Fits 5/16" T-Track, please check the fitment with your specific type of track.