Machined aluminum clamp maintains a secure hold of the extractor rod for fast, easy removal without scratching or gouging the metal surface. Steel, Allen head screw tightens to pull the clamping halves together for a non-slip hold. Grasp the tool and unscrew the extractor. Ensures professional-looking results everytime. Available for RugerA(R) Security-SixA(R). Recommended for use with Brownells adjustable extractor support tools. Mfg: Brownells SPECS: Aluminum, black. 1A 1/2" (3.8cm) diameter x A 1/2" (1.3cm) thick. Security-SixA(R) - .266" (638mm) I.D. fits RugerA(R) Security-SixA(R) only.