A solid aluminum ball starter made to handle the tight loads of target shooters, etc.. Durable enough to withstand the repeated hits of a small hammer or mallet. The 2-1/2" shaft ends with a stud specifically made for your caliber, and its hexagon shape will not roll off the shooting bench. Each starter is stamped with caliber designation. available in .32, .40, .45, .50 and .54 calibers.