What does the "LR" indicate in the 690LR model number? Wilson October 30, 2020 21:12 Updated The "LR" stands for lever release. Related articles Can liquid blade coolant be used with the 1410 metal cutting saw? What are air compressor tanks made of? What causes swirl marks? Can I put a 1/2" chuck on a 3/8" drill? What can cause premature pad failure? Comments 0 comments Please sign in to leave a comment.