Redding Neck Sizing Bushings are available in two styles, both featuring the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring full compatibility and easy interchangeability with all Redding Bushing Style Sizing Dies. These bushings are offered in precise .001 inches size increments, spanning from .185 inches to .368 inches and cover a wide range of calibers from .17 to .338. Each bushing is clearly marked with its size I.D., allowing for quick and accurate selection. By choosing the correct bushing, you can achieve the optimal neck tension to securely hold the bullet, minimizing excessive resizing for improved accuracy and consistent performance.