Precisely calibrated to apply the required 40 inch pounds of torque to tighten the two socket-head cap screws on the bolt carrier key.
AR-15, Issue:10, Page:078
AR-15, Issue:10, Page:079
Big Book Catalog, Issue:68, Page:082
Big Book Catalog, Issue:68, Page:083
SPECS: Chrome-plated steel. 3½" (8.9 cm) long. 4-1/8" (10.5cm) wide handle.