The apex action enhancement kit for the cz 75 b series pistols is designed to improve performance and reduce the large difference in trigger pull weight that exists between the double-action first shot and the subsequent single-action shots to approximately 2 pounds.The hammer and sear have matching apex engineered single-action engagement surfaces that yield a clean, consistent single-action style trigger break while providing a smooth stack-free double-action.The matched sear and hammer engagement surfaces require eliminate the need for any polishing or stoning.*note- for thumb safety models only.Includes apex performance hammer for cz 75 b (thumb safety models), performance matched sear for for cz 75 b (thumb safety models), duty/carry mainspring, competition mainspring, reduced power firing pin spring and a set of two replacement hammer pins.Finish: BlackType: Hammer & Spring KitModel: Action EnhancementHammer Type: Exposed