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 they can freely interchange with all Redding Bushing Style Sizing Dies. These bushings come in .001 inches size increments, covering a range from .185 inches to .368 inches and are compatible with all calibers from .17 to .338. Each bushing is clearly marked with its size I.D. for easy identification. By selecting the correct bushing, you can provide the ideal amount of neck tension, ensuring the bullet is held securely without excessive resizing, resulting in consistent and reliable performance in your reloading process.