To secure a piece of material place the material on the bed and assure that it is parallel to the edge of the bed or one of its tracks.
Next assemble the Double Tread Bolt and Track Wedge. Then slide the Wedge into a bed track.
Add the Top Clam Plate and Bolt and loosely place it over the material.
Slide the Tri Angular bock under the other end of the plate and tighten down. Always use at least two clamps.