The Master Lock aluminum lockout hasp with plastic-coated handle has a spark-resistant aluminum jaw that closes to form a shackle held closed by up to six padlocks secured through a scissor-action handle. When this hasp is closed, the two halves of its handle overlap like scissors, and the six holes in each half of the handle align to create six locking holes, any of which, when blocked by a padlock (sold separately), obstruct the hasp's jaw from opening and allowing access to the locked out device or energy source. The handle is coated with non-conductive plastic to improve grip and protect equipment from scratching. This hasp 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 help reduce accidents, during maintenance or repair. Lockout hasps are often used to secure energy sources in the off position during maintenance or repair when multiple workers are on the job. They consist of one shackle that can be locked closed by one or more padlocks, providing the ability to use multiple padlocks in a place where only one shackle will fit.

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