The Lyman Universal Bore Guide Set with Interchangeable Tips is a high-quality gunsmithing tool designed for rifle enthusiasts. Made of durable steel, this set includes interchangeable tips ranging from .17 to .416 caliber, ensuring a precise fit for any rifle. Manufactured by the reputable brand Lyman in the United States. this bore guide set is perfect for maintaining and cleaning rifle bores, enhancing accuracy and performance during shooting sports. Free Shipping & Free Returns.