Orangeville, ON (Harold Doan and Sons Ltd.) Master Lock introduced the ProSeries® product line in 1992. This included both Weather Tough® and High Security, iron shrouded, Rekeyable Padlocks. Master Lock is a worldwide leader in portable security products. They continue to set the standard for quality and selection. Customize Master Lock ProSeries® padlocks to meetContinue reading "Master ProSeries Rekeyable Padlocks"