DLM or Dock Leveler Manufacturing is a division of Systems Inc., and was acquired by the company in 1994. As part of System Inc.'s network of companies, they have a nationwide presence as a leading dock equipment provider. DLM offers pit style dock levelers with either mechanical, hydraulic, or air powered systems. For the hydraulic and air powered levelers, they have barrier lip safety options. In addition to pit levelers, mechanical and hydraulic edge-of-dock levelers are also available. Another economical dock solution available is DLM's top-of-dock levelers. These offer dock efficiency at a fraction of the cost of a pit leveler. Safety is also important to DLM, with a full line of safely products. They offer vehicle restraints, a dock communication system called Dock Alert, and safety barriers.