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 compatibility and seamless interchangeability with 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., allowing for easy identification and selection. By choosing the correct bushing, you can provide the ideal neck tension to securely hold the bullet without over-resizing, ensuring optimal performance and consistency in your reloading process.