The Forster Outside Neck Turner Accessory for Original Case Trimmer delivers unmatched precision with 0.0001 inch tolerance and unique concentric turning technology that ensures uniform neck wall thickness.Forster Outside Neck Turner Accessory for Original Case TrimmerPrecision tolerance of 0.0001 inches when properly adjustedConcentric turning system creates uniform neck wall thickness and outside diameterCircular carbide cutter head with easy adjustment capabilityControllable feed rate via rotating feeder camMechanical stop for precise cut length controlEssential for serious reloaders seeking consistent case preparation this turner eliminates the pilot-only centering limitations of handheld turners by turning cases concentric to their true axis for superior accuracy.