Model TW-1 is a Universal Wrench with three openings on one end (1-1/4", 1-1/8" & 11/16") for tightening various cylinder valve connections and most commonly used gas connections.  Note: This is not a spark-proof wrench.

Model TW-2 is a 3/8” Square Wrench for opening cylinder valves which do not have hand wheels such as chlorine, hydrogen sulfide, ammonia, etc. Note: This is not a spark-proof wrench.

Model TW-4 is a 3/8” Allen Wrench for removing the valve outlet plug from CGA 240, 580, 590 and 510 cylinder valve outlets. These plugs will normally be found in valves used on cylinders containing helium and other rare gases, ammonia and amines, and high purity grades of liquefied hydrocarbons. Note: This is not a spark-proof wrench.

Model TW-5 is a specially constructed Cylinder Handwheel Wrench that enables easy opening of cylinder valves that have been fitted with a hand wheel. The design is also suitable for removing difficult cylinder caps. Note: This is not a spark-proof wrench.