VOLKEL - 25mm x 42.0mm O\/D - Conduit Guide. These conduit dies are commonly used to cut threads in a hole that has been partially threaded already when using the more tapered kind of tap. These are easy to use and can be installed on a die wrench or machine tool. This tooling has been manufactured by VÖLKEL and is part of the V-Coil brand, with 100 years of experience in manufacturing screw taps, VÖLKEL has become one of the worldwide leading suppliers for threading tools. This is not a stock item therefore please allow 1-3 working days for dispatch. As this is not kept as a stock item, this is non-returnable & non-refundable. VOLKEL - 25mm x 42.0mm O/D - Conduit Guide