And the company installed trailer restraints will solve the problem of inadvertant movement of semi trailers when loading or unloading. Are you sure? In driving around 285 north of Atlanta on December 29th GladHanger counted 35 semi-tractor trailer combinations, and took pictures of 3 trailers that WILL NOT function with trailer restraints - so if that percentage were to hold true, about 10 % of the trailers backing into your dock CANNOT be locked out from movement........think about that from a safety perspective, 10 % of the time our employee's could be at significant risk....10 %!!!! So like any other potential one in ten times your dock could be at risk for significant safety failure........... how about those odds..........a simple Glad Hand Lock applied to every trailer every time drives those odds to a potential 0 percent of failure......... the GladHanger puts that tool in the right place at the right time for a minimum investment........ is it worth a Glad Hanger, a Glad Hand Lock, a procedural change to mandating the Glad Hand Lock and a 5 minute installation to gain that 10 % back?