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:69, Page:230
Big Book Catalog, Issue:69, Page:487
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. Designed for K, L and N Frame yokes only. Crane Ball & Spring Kit - Contains 20 locking balls, 20 springs, and staking punch. Crane Ball & Spring Refill - Contains 10 balls and 10 springs.