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Master Lock is an American producer of lockout-tagout (LOTO) materials which are used to work safely on your machines during maintenance work. 

With more than 90 years of experience in producing padlocks, Master Lock is now the largest worldwide producer of padlocks. The products of Master Lock are all designed completely according the applicable OSHA-standards and are sustainable, standardised, have a sturdy design and are identifiable.

Master Lock Products

Master Lock's range includes safety padlocks, lock multipliers, tags and labels, locks and lockout stations.