These tools do not slip in the hands through a special plastic wrapping around the handle. Headless screws on both ends allow an easy exchange of the insets and safely clamp them. Both ends of the handle can hold a tool, allowing you to clamp different shaft diameters. The metal core has enough counter-balance for the insets and prevents vibrations by its large mass. The surface is bronzed. It is possible to fix an additional torque arrestor handle in the crosswise threaded holes at each end in order to gain better control. Designed by Kel Mc Naughton.