The RCBS Trim Pro 3-Way Cutter is automated case preparation at its finest. Its unique three-blade head configuration trims cases like the standard cutting tool, but in addition to trimming to length, inside blades chamfer the case while an outside blade deburrs it. The 3-Way cutter attaches easily to both Case Trimmers and Trim Pros. NOTE: This product is not for 17 to 20 caliber.