Ergonomically shaped, heads offset. Shank with sturdy HAZET double-T-profile. Surface: chrome-plated, head polished. DIN 837 form B, ISO 10103. Made in Germany. Wrench size: 16 x 17. Total length (for class): 170 mm. Output: Outside hexagon Traction profile. Net weight: 0.06 kg. * = not according to DIN