About Master Lock
Master Lock stands as one of the world's most recognised security brands, with over a century of innovation in padlock design and manufacturing since its founding in 1921. ## The Invention That Changed Security Harry Soref, a travelling locksmith who had worked across the US, Canada, and Mexico, invented the laminated steel padlock in 1919. Inspired by bank vault door construction, Soref's revolutionary design used layered steel to create exceptionally strong lock bodies at an economical price. This innovation was so significant that the American Association of Master Locksmiths awarded Soref their only gold medal in 1931 for making the greatest contribution to lock development in over 50 years. ## Legendary Durability Marketing Master Lock became a household name partly through their iconic Super Bowl advertising campaign beginning in 1974. The commercial featured a sharpshooter firing at a Master Lock padlock, which withstood the bullet while remaining functional—proving their tagline "Tough Under Fire." The company famously spent almost their entire annual marketing budget on this single Super Bowl ad slot for many years. ## Corporate Evolution and Expansion Originally a family business, Master Lock was acquired in 1970 and is now part of Fortune Brands Home & Security. The company expanded through strategic acquisitions, purchasing American Lock in 2003 and SentrySafe in 2014 for $117.5 million. Headquartered in Oak Creek, Wisconsin, Master Lock products are distributed globally. ## Master Lock in UK Supermarkets Grocefully helps you compare Master Lock padlock prices at UK supermarkets including Morrisons. Our comparison tools cover the Master Lock range including solid aluminium padlocks for everyday security and Excel series locks for enhanced protection.

