Bachmann E-Z Mate Magnetic Knuckle Couplers with Metal Coil Springs are compatible with all HO Scale magnetic knuckle couplers from a variety of manufacturers. Uncoupling operates with a standard metal "glad hand" trip pin and under-track magnet. Metal coil springs keep the coupler knuckle in the proper position for reliable coupling and pulling. E-Z Mate Magnetic Knuckle Couplers are available in several styles to compensate for different positions and heights of coupler mounting housings on rolling stock. Check out the entire selection of Bachmann HO Scale trucks and couplers.