CRL's Premium Cap Rails are manufactured using a unique process known as Bump-Forming that ensures accuracy, consistency, and high quality. Unlike roll-formed cap rails, CRL's Bump-Formed Premium Cap Rails do not contain the stress and spring back associated with the roll-formed product. Welds on both sides of the channel add strength and stability to the Cap Rail. This results in a Cap Rail with tighter tolerances, consistent radius, and the ability to fit into welded corners without twist or discoloration. Put simply, it means this is the best product in the market place.