This hammer will fit most models DA / SA CZ Pistols, such as CZ 75B, CZ 75 SP-01, CZ SHADOW 2. 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. Use in conjunction with light main spring (12-13lb) for smoother lighter DA trigger pull.We recommend using the competent gunsmith's help for fitting the hammer.The safety or sear needs to be fitted after installation of the hammer.____________________FEATURES:Hammer width: 8,0mmMaterial: SteelNote on Hammer Width: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!