Master Lock Smart
Master Lock Smart is the Bluetooth and electronic lock line of Master Lock, a century-old padlock and security brand.
Last updated September 15, 2026
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Overview
Master Lock Smart refers to the Bluetooth and electronic lock offerings of Master Lock, a brand that has been a name in locks and safes for over a century. The official site lists Bluetooth & Electronic locks such as the 4400EC, 4401LHEC, 6400ENT and 5440EC, and the brand's timeline records the 2015 launch of a Bluetooth Padlock. Master Lock is part of the Fortune Brands Innovations portfolio.
History
Master Lock was founded by Harry Soref in 1921. The brand introduced its first combination lock in 1935, became the largest padlock manufacturer in the US in 1950, and began national advertising in 1954. It introduced the first resettable combination lock in 1982, expanded global sales in 1990, and introduced the first TSA-Accepted travel lock in 2004. The Magnum line of padlocks was introduced in 2007, and a Bluetooth Padlock launched in 2015. Master Lock celebrated 100 years in 2021. In 2023 it acquired Yale and August, launched Fireproof Safes, and in 2024 launched cLOTO. The brand is part of the Fortune Brands Innovations portfolio.
Products and positioning
As the authority in locks and safes, Master Lock has been a name synonymous with confidence and security for over a century.
4400EC - Bluetooth & Electronic Locks
4401LHEC - Bluetooth & Electronic Locks
6400ENT - Bluetooth & Electronic Locks
5440EC - Bluetooth & Electronic Locks
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