Features: 1.Lock Design: Double opening quad lock design, the holes on both sides of the lock can be used to lock the cable or for locking the pneumatic male thread fittings that bend downward. 2.Safety Protection: This locking device isolates and secures the plug, to isolates hazardous energy and protect employees from electrical accidents during equipment maintenance. 3.Solid Material: Made of strong and durable ABS engineering plastic, 5mm wall thickness, structurally strong, built to withstand harsh environments such as factory sites. 4.Premium Plug Device: Red plug cover with striking "DANGER LOCKED OUT DO NOT OPERATE" label, with 7mm keyhole diameter, 8, 10, 11, 11.5, 12, 18.5mm socket hole diameter. 5.Lock Suggestions: Recommended to use with insulated padlocks and safety plates (not included) to achieve the purpose of energy isolation, equipment locking, and preventing misoperation. Specification: Item Type: Electrical Plug Lock Material: ABS Socket Hole: Approx. 8mm/0.31in, 10mm/0.39in, 11mm/0.43in, 11.5mm/0.45in, 12mm/0.47in, 18.5mm/0.73in Size: Approx. 165x97x95mm/6.50x3.82x3.74in Keyhole Diameter: Approx. 7mm/0.28in PackageList: 1 x ElectricalPlugLock