The K-PAK is designed specifically to fit 6-shot K-frame and D-frame size revolvers. Quickly loads 3 rounds at a time similar to two half moon clips. The K-PAK works well with all grip types. Great for concealed carry. The K-PAK fits nearly flat in pockets of shirts, pants, vests and jackets. Made from tough BPA, BPS, BPF free polyurethane material for use in both hot and cold environments. Will not correctly fit RugerA(R) revolvers The Zeta6(TM) K-PAK(TM) Speed Loader will fit the following 6-round revolvers chambered in 38SP/357 Magnum: Smith and WessonA(R) 10, 11, 12, 13, 14, 15, 19, 64, 65, 66, 67, 68, 315 ColtA(R) D-frames Mfg: Zeta6