Air Source Lockout Device Pneumatic Air Supply Hose Connector Locking Air Supply Safety Lock for Industrial Equipment 1Durable Material: Made of heat resistant, corrosion resistant, and impact resistant 304 stainless steel, making it robust and durable with a longer lifespan. It is suitable for various harsh environments. 22 Lock Holes: This air source lockout device can accommodate 2 padlocks or lock buckles with a diameter of less than 8mm, prevents the pneumatic connector from connecting to the compressed air source. 3Versatile Use: With its multi hole design, this device is suitable for locking 5 different sizes of air source connectors. One lock device can replace multiple size locking devices, making it widely applicable, simple, and efficient. 4Easy Installation: This pneumatic lockout device allows for easy and fast installation without any tools, prevents the pneumatic connector from connecting to the pressured air source, isolation between equipment and compressed air source. 5Applications: This gas cylinder lockout tagout device is perfect for various scenes like car manufacturing, steel smelting, petrochemical, and other industrial scenes.