Lyman's Universal Trimmer features the patented Universal Chuckhead which handles any case from .17 caliber to .458. Features coarse and fine adjustments. Adjusting ring lets you "dial in to an approximate setting for quick repeatability". Includes 9 of the most popular pilots. Additional pilots add even greater range of calibers. Optional power adapter lets you upgrade to power in seconds. Whether you need to reload ammo for a 9MM or a .458 Magnum.