Gas bottle cylinder combination spanner & spindle key DF drop forgedPrice includes VAT & Free Fast Delivery Strong, black, drop-forged spanners with integrated cylinder key.3/8" BSP for common hose nuts and 5/8" BSP jaw for common regulator nuts for connection to BOC, Air Products, Air Liquide type industrial gas cylinders.Square cylinder key to open & close gas supply valve.Can also be used in the home/camping for lighting Gas Cookers. Please do not hesitate to contact us with any further enquiries.