Version:
Sturdy octagonal shank with cylindrical shaft. Uniformly through hardened over the entire length. Head specially annealed to prevent splintering. Actual ⌀ 0.05 - 0.5 mm less than nominal diameter, prevents the pin punch from jamming in the hole.
Standard:
DIN 6450.
Safety tested to DIN 7255.
Material:
Standard quality of chrome vanadium air hardening steel, painted.