The cylinder latch pivot on Ruger's double-action revolvers has a very wide slot for its size. Don't damage your screwdrivers, or worse, your cylinder latch pivot pin, by using the wrong size. Use the right tool instead.

Starting with a long-shank flathead bit, GENERICO fits it precisely to the slotted-head threaded pivot pin common to the SP101, GP100, Super Redhawk, and Redhawk.