What does the "LR" indicate in the 690LR model number? Support 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? What is the motor diameter of the Porter Cable 7815 router? Can I put a 1/2" chuck on a 3/8" drill? Comments 0 comments Please sign in to leave a comment.