Torque Wrench PROTO

Proto Tools is an American industrial hand tool company. Founded as Plomb, it is presently a division of Stanley Black & Decker. The company is credited with creating the first combination wrench in 1933. Calibrated to ± 6% of torque reading, clockwise at 20% to 100% of full scale. 1/4" Square to 1/4" Hex Adapter included for use with insert bits. Positive self locking lock ring. Positive self locking lock ring. Floating three point reaction for repeatability N.I.S.T. (National Institute of Standards and Technology) traceable certification supplied with J6106ACERT. Laser marked easy-to-read scale. Meets or exceeds ASME B107.14M