The "Blue and Improved" The Original Line® Rod Lock cylinder feature permanent grease lubrication. Design enhancements have more than doubled the anticipated service life of this cylinder, featuring a biased normally closed clamp on the piston rod that holds the rod in position when air pressure is not present.
                                        
                                        - Bore sizes:  3/4", 1-1/16", 1-1/2", 2", 2-1/2", 3"
 - The rod lock design is not a safety device
 - Hard chrome plated stainless steel piston rod
 - 50 PSI minimum required to release locking mechanism
 - Blue and Improved design doubles previous cylinder life
 - Permanent grease lubricant requires no additional lubrication during service