Master Lock introduced the ProSeries® product line in 1992 with Weather Tough® and High Security, iron shrouded, rekeyable padlocks. Intent on providing locksmiths with greater ease and flexibility, Master Lock designed the padlocks to use standard components across the line.
Master Lock has also added extensive interchangeable core and door hardware cylinder options to create maximum options for padlock integration into facility padlock and door lock systems. Today, ProSeries® is the only product line available for so many different applications, making Master Lock the source for complete commercial security.
The Master Lock lines we carry offer robust, secure solutions for the education, healthcare, facilities management and corrections markets. They are not limited to padlocks, but also include locker locks, door accessories, key blanks, keying kits, pins, special keys, and tools.