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 ⌀, prevents the pin punch jamming in the hole.
Special quality extra chrome vanadium steel (i.e. the highest possible peak hardness - approx. 59 HRC - combined with special toughness), chrome-plated. Hand grip with a non-allergenic elastomer coating.