1911 , 1911-A1 Plunger Tube Staking Tool Brand new combination tool stakes the 1911 Pistol Plunger Tube firmly in place. Locking bar is milled for a precise fit to both 5/32" , Mil-Spec, and 3/16", oversize tubes. Spotting holes along the back of the locking bar give correct alignment for a tight crimp. Machined from solid steel bar stock, with metallic silver finish. made in the USA and available only from AR Specialties.