Redding Neck Sizing Bushings come in two styles, both with the same external dimensions of 1/2 inches O.D. x 3/8 inches long, ensuring full interchangeability across all Redding Bushing Style Sizing Dies. These bushings are available in .001 inches size increments, ranging from .185 inches to .368 inches, covering all calibers from .17 to .338. Each bushing is clearly marked with its size I.D., making selection quick and accurate. By choosing the correct bushing, you can achieve the ideal amount of neck tension to securely hold the bullet without excessive resizing, ensuring consistent and reliable performance in your reloading process.