[Uses] Adaptor to change the insertion angle from 19.0 sq to 12.7 sq. [Functions and Features] Converts 19.0 sq. insertion to 12.7 sq. KTC socket adapter is sold by DCM. We also carry many other wrenches and spanners. Caution: Please do not use the tools for anything other than their intended purpose. Do not use if you notice abnormalities such as distance, chipping, wear or deformation. Do not work in an excessive posture. Please do not modify it.