Gives You The Inside Story To 1/1000 or 1/10,000 Inch
Measures bore diameter, choke constriction, chamber (except 10 gauge chambers) and forcing cone dimensions. Shows dents, bends and other imperfections. Very accurate, .001", direct-reading dial indicator, or .0001" digital readout indicator is mounted on 16½" long shaft on which the appropriate gauge head is installed. Includes well written instructions.
Big Book Catalog, Issue:68, Page:512
SPECS: Tool steel heads and gauging rings. Maximum measuring depth: 15-3⁄8" (39.0cm). Single Gauge Bore Mike Set includes 1 Head, 1 Gauging Ring, Indicator, Shaft, fitted Wood Case and Instructions. Single Gauge Bore Mike Head includes 1 Head and 1 Gauging Ring. Complete Bore Mike Set includes 4 Heads (12, 20, 28, .410 - NOT 10 or 16 gauge), 4 Gauging Rings, Indicator, Shaft and Instructions, all in a Wood Case.