The Kegco KT2410W-M Keg Coupler is compatible with M System beer kegs such as Schneider, Aventinus, and Einbecker which were recently introduced to the U.S. market. It is not to be confused with the German Slider A System Coupler. Although it has the same body, the probe configuration is different and they are not compatible. The KT2410W-M has an easy to use ergonomic handle. Simply press the lever down to tap a keg and pull it up to untap it. A mechanism inside the coupler handle automatically locks it into position so you don't have to pull the handle out before moving it up or down. Anyone who has pulled the handle off of a keg coupler can appreciate the convenience! The keg probe, which is the part that actually presses down into the keg to allow beer to pass through the coupler, is made of high quality stainless steel. It is resistant to chemicals and won't chip like chrome, making it more sanitary than chrome plated brass. It also features a 55-psi pressure release valve to prevent over pressurizing the keg.