20-100 in.oz., Micrometer Adjustable Torque Screwdriver SKU: MAS-100Z Micrometer Adjustable Torque Screwdriver Range: 20-100 in. oz. Drive Size: 1/4" MADE IN USA! Industrial quality-all metal aircraft aluminum micrometer adjustable torque screwdriver. Precision CNC ground 3 post reaction mechanism results in very repeatable "clicks" without reverse torque application after cam action. 100% CNC machined components. No plastic parts to wear out. CNC machined aluminum lock ring. Large, easy to read laser marked scale. Key Benefits +/- 4% I.V. 20-100% accuracy standard Aircraft aluminum body and handle. Large easy to read laser marked scale Precision CNC ground internal components No plastic parts that wear out4% accuracy from 20-100% of full scale range CW CNC machined aircraft aluminum lock ring handle and nose cone. Valve spring quality compression springHighly repeatable readings1/4" square male drive High Quality US made 1/4" square to female hex adapter included for screwdriver bits NIST traceable cert supplied standard.Proudly machined assembled and calibrated in the USA.