NEXEN ROD LOCK For precision holding, nothing matches Nexen's linear locking devices that work with guide rod systems and NFPA or ISO cyliners. The spring engaged, air released Rod Locks are available in a range of standard or custom configurations. They provide: Virtually no backlash A large clamp-to-rod surface area in a compact size Guide bearings/seals on stand alone versions. To learn more about our Rod Lock line of linear devices, please contact us. Click here for our Rod Lock advertisement (pdf)