July 24, 2013 – An aggressive lockout/tagout (LOTO) system ensures machinery or other equipment poses no danger to employees while under maintenance or repair, but the best LOTO system cannot protect them when duplicate locks or keys are in circulation. LifeGuard from Master Lock takes the safety of your employees to a whole new level, says the company, explaining this no-charge service ensures there is only one unique key for each Master Lock. This means every LOTO lock at your location has only one lock(s) assigned to a specific individual.