Redding Neck Sizing Bushings are available in two styles, both with the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring full interchangeability with all Redding Bushing Style Sizing Dies. These bushings are offered in precise .001 inches size increments, covering a range from .185 inches to .368 inches and accommodate calibers from .17 to .338. Each bushing is clearly marked with its size I.D., allowing for easy and accurate selection. By choosing the right bushing, you can apply the ideal amount of neck tension, securing the bullet properly without excessive resizing for consistent and reliable performance.