Thin, lightweight, stainless steel gauge fits easily in your pocket and measures choke constriction on all .410, 28, 20, 16, 12, and 10 gauge shotgun barrels. Great for collectors, dealers and shooters that need a fast, visual verification of choke constriction. Mfg: Royal SPECS: Stainless steel, bright polish. 5-1/8" (13cm) long.
