Eemann Tech Ultra Light Hammer SA/DAThis 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