DSPIAE Tungsten Steel Engraver Chisel. Handle is not included. High Ductility Steel material. This chisel is used for carving your own panel lines into plastic models. 1.8mm Chisel. Can use on Plastic, ABS, PVC, Polyester Resin, Epoxy Resin. Do not use this to scribe on metal. Shank diameter is 3.175mm. Recommend using DSPIAE AT-TH Tool Handle with the chisel.