"This SRL offers a fast-acting brake mechanism that features a durable, well-engineered high-impact thermoplastic housing to increase service life and rugged, impact-absorbing, protective bumpers for added durability. An integral load indicator lets you know when it is time to remove the product from service. The SRL unit has a 400 lb. working capacity as a standard feature and a field-replaceable lifeline option. Standard lifeline length is 30'. Meets all applicable OSHA regulations and ANSI A10.32, ANSI Z359.1 standards, CSA certified."