The CCM Half Block hammer is a heavy weight (40 gram) slotted hammer.It will improve the performance of the half block style autococker marker. This is a stainless steel hammer with the sear lug installed. CCM products carry a LifeTime Workmanship Warranty. This warranty applies only to the original purchaser and is NON-TRANSFERABLE. This warranty does not apply to items that have been abused, misused, modified or repaired.