Manufacturer Description6" End-Loading Composite RAM Tough-Track The Extruded Composite Tough-Track™ is your cost effective track mounting solution. This version of the Tough-Track does not use end caps and features a tapered end allowing for stress-free insertion and removal of track accessories. The hardware sits in a sunken channel so the T-Bolt won’t get stuck when sliding across the track. With pre-drilled holes for #8 screws, installing the Tough-Track is easy. Hardware not included.Dimensions:Overall length: 6.0"Overall width: 0.91"Track thickness: 0.52"Material: High Strength Composite