The Master Lock adjustable cable lockout is an integrated lockout hasp and 5/32" (4 mm) diameter, flexible multi-stranded steel cable that combines with a padlock (sold separately) to temporarily prohibit access to a variety of energy sources or machines and provide the ability to require up to four authorizations to allow access to a locked out resource. The lockout hasp is made from Zenex thermoplastic, which is nonconductive and functions in extreme temperatures: -50 to 350 degrees F (-46 to 177 degrees C). The cable is coated with clear plastic to resist abrasion, and rolls up for compact storage. This product includes three (English, French, and Spanish) high-visibility warning labels with erasable areas for task-specific details. One label fits on the lockout at a time. This lockout is for use as part of a lockout-tagout (LO/TO) safety procedure required at facilities where a device or energy source needs multiple-person authorization to be accessed safely. When used according to manufacturer's recommendations, this product is covered by a limited lifetime warranty against defects in workmanship or materials.

Lockout-tagout (LO/TO) safety procedures, as defined by Occupational Safety and Health Administration (OSHA), require that lockout devices be durable and standardized. Lockout devices use color, warning labels or tags, and a physical barrier to temporarily prohibit machine operation or power activation, and reduce accidents, during maintenance or repair. Cable lockouts consist of a steel or nylon cable and a lockable hasp to help prevent the cable from being loosened or pulled out of the target latch or device.

Master Lock manufactures padlocks, combination locks, and related security products. The company, founded in 1921, is headquartered in Milwaukee, WI.