www.ishn.com/articles/102710-lockout-device-by-master-lock

Lockout device by Master Lock
November 3, 2015
Master Lock Safety Solutions™ has introduced an innovative new lockout device specifically designed for use during pipeline maintenance. The Blind Flange Lockout Device is a best-in-class solution that provides a secure, highly adaptable and cost-effective option for protecting employees from hazardous energy.
Master Lock, www.masterlock.com