Harris Calorific® 50-9 Series 8" Automatic Medium Duty Torch Handle has cutting capacity of 5" and welds to 1/2". Handle featuring Flash Guard® check valves has on/off feature for cutting, brazing and welding with acetylene gases. It has a gas control system to minimize operating cost and improve safety as well as convenience. Thumb operated on/off gas control and adjustable pilot light eliminates relighting and flame readjustment when the torch is used every time. It has "B" 9/16"-18 R+L inlet connection and is UL listed.