The Mountz Gedore 018100 RTU 170 (SILVER) Dynamic Torque Limiter, 20-170 cN.m - 1.8-15 lbf.in, 3/8" Sq is used to convert conventional hand and power tools into torque limiting tools. Simply install the RTU to the end of a traditional power tool or hand tool to convert. Non-impact powered assembly applications can be performed quickly and accurately, including the tightening of bottles, caps and lids.