This Master Lock Universal Ball Valve Lockout fits into virtually all manual, quarter-turn ball valve handles to protect against accidental valve opening, and it attaches to the handle to prevent movement. The lockout is suitable for confined spaces and insulated pipes, its ergonomic shape optimises tightening on the valve. It has an aluminium and steel body, and a steel pin which fits behind the valve stopper tab. The adjustable jaws hold the valve in position. The lockout's construction means it can withstand corrosive environments and extreme conditions, and is heat resistant up to 538°C.