O' Reliable! The Standard coupler used by most modelers today! I have used them for decades. Never had one break! Unless you count the one which broke when I dropped a box car and it landed on the coupler! Use just about every car out their today. If you need a special coupler please check with me. I have a huge selection of odds and ends in stock. Most are not very common. I have a chart that will help us figure out which coupler is correct for your cars and engines!