Redding Neck Sizing Bushings are available in two styles, both featuring identical 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 .001 inches size increments, ranging from .185 inches to .368 inches and cover all calibers from .17 to .338. Each bushing is clearly marked with its size I.D. for quick identification. By selecting the appropriate bushing, you can achieve the perfect neck tension to securely hold the bullet, ensuring proper performance without the need for excessive resizing.