Fully adjustable hook or C-spanner. The adjustable opening is 3/4" to 2" and the tool is made out of chrome-vanadium. The spanner fits the holes with a diameter of 3.2 to 5.2 mm due to the interchangeable pins.

The tool comes with 3 stainless interchangeable pins: 3.17, 3.97 and 4.73 mm.

The ultimate solution to install or remove a variety of 1st stage regulators caps.

Regulator is not included.