Designed for the RCBS MatchMaster Precision Case Trimmer, these precision-designed collets ensure your cases stay secure, giving you a precise and repeatable trim every time. Available in four sizes, covering a wide range of cartridges. Collet Fit List: Collet #1 - (.379, .473, .532 Diameters): 222 Rem Mag, 223 Rem, 225 Win, 22-250, 220 Swift, 243 Win, 6mm Dasher, 6x47 Lapua, 6XC, 244 Rem, 6mm BR, 25-06, 264 Win Mag, 260 Rem, 6.5x47 Lapua, 6.5 Creedmoor, 6mm Creedmoor, 6mm SLR, 6.5x57 Mauser, 6.5mm Win, 6.5 Jap Mauser, 6.5x55 Swede, 6.5x55 SKAN, 270 Win, 270 Savage, 270 Gibbs, 270 Wby Mag, 270 Ackley, 7x57 Mauser, 7mm Wby Mag, 7mm-08, 280 Rem, 284 Win, 7mm Rem Mag, 7mm BR, 30-06, 308 Win, 300 Win Mag, 300 Sav, 303 British. Collet #2 - (.350, .418, .506 Diameters): 30-30 Win, 7.5x55 Swiss. Collet #3 - (.356, .440, .545 Diameters): 6mm PPC, 6mm Krag, 300 Rem Ultra Mag, 300 WSM, 300 SAUM, 6.5 PRC, 300 PRC, 7mm PRC, 26 Nosler, 28 Nosler. Collet #4 - (.310, .605 Diameters): 300 Norma Mag...