Add Cylinder Lock-Up Strength The Foolproof Way
Adding a spring-loaded, locking ball in the cylinder crane is standard practice on Smith & Wesson K, L and N Frame revolvers, especially when installing a bull barrel. Steel fixture holds the crane secure and in proper alignment for drilling; makes it virtually impossible to mislocate the hole or drill at the wrong angle. Comes complete with No. 30 drill bit, .125” diameter locking balls, springs, and staking punch.
Big Book Catalog, Issue:67, Page:228
Big Book Catalog, Issue:67, Page:503
New Product Supplement, Issue:571, Page:008
SPECS: Drilling Fixture - Steel, blued finish. 1½"
(3.8cm) long, 1" (2.5cm) wide, 2" (5.1cm) high. Includes No. 30
cobalt drill bit, (20) 302 SS locking balls, 20 springs, and staking
punch. Crane Ball & Spring Kit - Contains 20 locking balls,
20 springs, and staking punch. Crane Ball & Spring Refill -
Contains 10 balls and 10 springs. Designed for K, L and N Frame