The ROC-LOC roll-off container locking system by Galbreath, a Wastequip brand, is a DOT-compliant, low-maintenance method for securing containers for transport. Compatible with most brands of cable hoists, hook hoists and trailers, the system requires 60 psi of air pressure, has two single-acting air bags to keep each arm in the “hold” position, and is designed to fully function in cold climates. 800/285-0666; www.galbreathproducts.com.