The ratchet head tilts ±15°, so the wrench still works where a standard wrench is obstructed. Reversible ratchet head, 45 teeth. Accuracy: ±4% clockwise, ±6% counter-clockwise (20-100% of full scale). Each wrench carries a unique serial number for traceability. Permanent torque scale on alloy steel, easy to read, metric and imperial. Locking device at the handle end: pull down to adjust, push up to lock the torque value. Non-slip grooves on the handle.