Dual scale, calibrated dual directionMade in the USAPositive lock with spring loaded pull down lock ringFast, accurate and easy to set with ergonomic comfort-gripEasy-to-read laser marked scalesIndividually serialized with matching certifi cate of calibration traceable to N.I.S.T.Most feature quick release buttons which provide good socket retention as well as easy socket removal (except KTI72176A)Each comes in a blow molded caseAccuracy: ± 4% clockwise ± 6% CCW of indicated value, CW, from 20% to 100% of full scaleMeets or exceeds ASME B107.14M-1994, ISO 6789 StandardsCovered by a 1-Year limited warranty