Made of high-quality steel and treated thermally for superior performance, this recoil spring is designed for CZ 75 models, including CZ 75 SP-01, Tactical, Shadow, Shadow 2, Tactical Sports, and TS2. It works with old CZ 75 slides that have a hole, and it is fully compatible with both plastic and steel guide rods, as well as recoil buffers. For best results, it is recommended to replace the spring every 5000 cycles.