1)  Spindle key with riveted safety rings made of steel
2)  Surface-hardened clamping jaws
3)  Hardened pipe-gripping jaws as production standard
4)  Drop-forged rear jaw with large anvil
5)  Proven internal dual-prism guide track design offers protection from contamination and damage. Large track surfaces fully machined to guarantee precision and long service life.
6)  Strong, forged spindle nut
7)  Drop-forged guide plates
8)  Easily adjustable central guide track
9)  High, optimally distributed clamping force from the centrally located and  well-protected spindle. The double-action trapezoid thread allows quick opening and closing.
10) Slim but strong guide rail made by drop-forging – therefore greater clamping depth
11) Protected precision spindle bearing
12) Drop-forged front jaw