The GTL425 is a coupler that is compatible with European "G" system kegs. The most popular beers that work with this coupler are Caffrey's, Watney's, Boddington and Anchor Steam. The GTL425 features a heavy duty ergonomic lever handle. This keg tap also features a 55-psi pressure relief valve and a nickel-plated forged brass body. To tap a keg all you have to do is pull out and then down on the lever handle to properly couple the keg.