Seekonk Precision Tools 3/8'''' Square Drive T-Handle Torque Wrench
Precisely calibrated to apply the required 40 inch pounds of torque to tighten the two socket-head cap screws on the bolt carrier key. Mfg: Seekonk Precision Tools SPECS: Chrome-plated steel. 3 1/2" (8.9 cm) long. 4-1/8" (10.5cm) wide handle.