This heavy duty steel Armorer's Wrench from Streicher's Defender Gear line fits the latest model telestocks and combines many necessary functions for the AR15/M16 armorer. A two sided wrench at one end fits either multi-point or peg style barrel nuts on barrels up to 1" in diameter. A breaker bar or torque wrench can fitted into the 1/2" square drive opening. Two other slots fit A1 and A2 birdcage flash suppressors and receiver extensions.