1.- Nodular Cast Iron Heads.
2.- Bar attachement to the Cast Jaw by a Rivet-Free System. Patented.
3.- High Resistance Steel Bar, Calibrated and Serrated. Oxyd protection: Varnished or Zinc Plated.
4.- Trapezoidal Thread Spindle, Zinc Coated.
5.- Striated Lacquered Wooden Handle