DIN 911 hex key ball end set
Thanks to this case, 9 sizes of long ball-end Allen keys are always available for reaching screws or threaded rods that are in difficult-to-access areas and that cannot be tightened with a short key. All keys are made of chromium-vanadium according to DIN 911 standards.
Chromium vanadium steel 58 CrV4 (1.8161)
S 2 to 6 min.: 52 HRC
S 8 min.: 50 HRC
S 10 to 12 min.: 48 HRC