Redding Neck Sizing Bushings are crafted for precision and versatility, offered in two styles that share identical external dimensions of 1/2 inches O.D. x 3/8 inches long. These bushings are fully compatible with all Redding Bushing Style Sizing Dies, allowing for seamless interchangeability. Comes in .001 inches size increments from .185 inches to .368 inches, they cover a wide range of calibers from .17 to .338. Each bushing is clearly marked with its size I.D., making it easy-to select the right one for your needs. By choosing the appropriate bushing, you can ensure just the right amount of neck tension, securely holding the bullet without excessive resizing, providing consistent and reliable ammunition performance.