Fits inside face bolt recess to support back side of the extractor rivet while you peen the other end to lock a new extractor in place. Just like the one Remington uses with one "cut" added for better support when clamping in the vise. Mfg: Brownells SPECS: Blued, tool steel, hardened to Rc 60-63. 2- 1/4" (5.7cm) high x 1- 3/4" (4.4cm) wide x 1/2" (12.7mm)thick.
