This INTRAFUSE® STEN magazine loader will save you time and frustration. Quickly and easily load your magazines with this simple to use sleeve-style loader. Depress the loader with one hand and position the next cartridge with the other. The textured surface provides a non-slip gripping surface to help keep things steady. There are no more parts to break, lubricate, or maintain. This handy tool also features a small opening for attaching a key chain or cord for storage. Works with the original military STEN 9mm magazine and the TAPCO 32rd 9mm MasterPiece Arms (MPA) magazine.