Find Barrel Thickness & Concentricity Before You Try To Thread
Know exactly whether a customer’s 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
Big Book Catalog, Issue:65, Page:487
New Product Supplement, Issue:566, Page:019
SPECS: Aluminum and steel, natural finish. 18¾"
(47.6cm) long x 5" (12.7cm) high.