A vehicle restraint secures a trailer to the dock to prevent premature departure and trailer creep during loading, a common cause of forklift accidents. DLM makes six: the TPR, TPR UniLock, PowerStop Automatic, PowerStop Manual, and EZ-Lock restraints, which secure the trailer’s rear impact guard (RIG), and the UXL and Unichock, which chock the trailer’s wheels.”

The DLM® TPR® truck positioned vehicle restraint is designed to automatically position itself and secure a trailer’s rear impact guard (RIG) to reduce the likelihood of premature trailer separation during the loading/ unloading process.

The TPR UniLock® is the only trailer-postioned vehicle restraint that can automatically remove "RIG Wedge" pressure. RIG Wedge is caused when the trailer is pushed forward during loading/unloading and the trailer's Rear Impact Guard (RIG) applies so much pressure to the restraint's hook that the truck driver must reverse the trailer in order to release the restraint.

The PowerStop® is a non-impact, self-aligning, mechanically operated truck restraining system. An optional light communication package can be added to the MML and MAL, which can also be upgraded to iDock Controls with an interactive message display.

The PowerStop® fully automatic vehicle restraint (AAL) is an easy-to-install, affordable restraining system. It comes equiped with a RIG sensor bar that notifies dock workers if the restraint's arm is not securely engaged with the trailer's Rear Impact Guard.

The EZ-Lock™ is a manual hook-style vehicle restraint that secures the trailer’s rear impact guard (RIG) at the dock to reduce the risk of premature departure and trailer movement during loading and unloading. Its spring-loaded housing lowers with truck contact, and the carriage automatically adjusts with trailer float. The EZ-Lock™ has an enhanced design with a patented Triple Range Hook that outperforms competitor hook-style restraints:
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The UXL is a wheel-based trailer restraint with advanced light communication. Package available as a standalone unit or integrated with other dock equipment. This universally effective chock helps prevent unexpected trailer departure or movement from the loading dock during the loading process.