A non-conductive adaptor that allows a 1/4" drive bit driver or drill driver to be used with 3/8" drive insulated sockets. There is no metal to metal contact between the ends, isolating the driver from the socketry. Manufactured to IEC60900 standards, for safe operator use on live circuits up to 1000v AC and 1500v DC, making it ideal for use by electricians, auto electricians or mechanics working on hybrid and electric vehicles.