The tamper resistant design of the Pre-Set series is particularly suited for high-volume use in assembly operations. A simple, cam-over design prevents over-tightening and possible damage to components. Pre-set Screwdrivers may be ordered factory set at no additional charge or they may be easily set with any quality torque calibration system. The end cap removes for easy access to the 1/8" hex adjustment screw. A hex adjustment key is included with each driver. The Pre-Set series includes four models with available torque settings from 6 in. ozs. up to 40 in.lbs. When precision and repeatability are a must, the choice is simple - CDI Torque Screwdrivers.