The GILCHRIST PRECISION CHOKE REAMER is designed for precise cutter to bore alignment and can fine-tune choke size or remove chokes for screw-in installations.
It requires the Gilchrist Handle and two Clymer Choke Tooling Bushings for operation, which must be purchased separately.
The reamer is suitable for 20 and 16 gauge cartridges and has an expansion range for 20 gauge "C" from .593" to .656".