Brownells Detent Ball Refill 9/64" Diameter (3.6mm) 20-Pack

The Brownells Detent Ball Refill Kit provides 20 replacement detent balls measuring 9/64" (3.6mm) in diameter. These small hardened steel balls are essential gunsmithing consumables used in firearm assembly and repair, commonly found in selector switches, safety mechanisms, and other spring-detent retention systems. Ideal for gunsmiths and armorers who need reliable replacement stock on hand.