Proxxon 3 piece tungsten carbide tipped tooling set proxxon 24556 this 3 piece tooling set includes holders for roughing for boring in holes of 12mm or more and for longitudinal turning 10 x 10 x 70mm to use with the proxxon pd 400 lathe system three tungsten inserts of 55 are included as well as a fixing screw and tx 8 spanner proxxon 24556 3 piece tooling set with tc tips