This hammer will fit CZ 75 SA/DA Also used for SA only guns. When used with SA only guns, do NOT use the DA parts. Greatly reduces sear creep, lightens and smooths the single action trigger. The Hammer is 8.0mm and is made of steel. Note: - Standard CZ 75 slide hammer notch width of 0.28" (7,15 mm) and hammer width of 0.234" (6,0 mm). - CZ 75 SP01 Shadow, Tactical Sport, CZ 75 Shadow slide hammer notch width of 0.355" (9,0 mm) and hammer width of 0.315" (8,0 mm). Check your slide notch width before ordering!