Manson Precision Wall Thickness Gauge

Know exactly whether a customerX’Xs barrel has adequate wall thickness before accepting and machining it for screw-in chokes. Unique design allows the gunsmith to mount the instrument (not the barrel) in a bench-top vise for ease of use and fast, accurate measurements. Aluminum block with steel probe and gauge arm provide excellent stability and consistency. High-grade, Procheck brand, dial indicator measures to .001". Helps check barrel concentricity, too. Mfg: Manson Precision SPECS: Aluminum and steel, natural finish. 18 3/4" (47.6cm) long x 5" (12.7cm) high.