Products / Dock Equipment / Truck Restraint / Serco / Serco SL20 Series Mechanical Vehicle Restraint Serco SL20 Series Mechanical Vehicle Restraint The manually operated Serco SL20 vehicle restraint system offers the same excellent performance and value as the SL10, but also includes manually activated interior and exterior red/green LED lights for improved communication. The control bar allows dock workers to easily engage and release the restraint from warehouse floor. Contact us Related products Serco SL60 Series Powered Vehicle RestraintSerco SL60 Series vehicle restraints provide automatic pu… Serco SL40 Series Mechanical Vehicle RestraintThe Serco SL40 is a manually operated vehicle restraint s… Serco SL10 Series Mechanical Vehicle RestraintThe manually operated Serco SL10 vehicle restraint is a b…