DIN 911, chrome vanadium, bright nickel-plated, for Allen screws. Short.
SW: 2.5mm, length: 58.5mm PROFILE: ALLEN SIZE / SIZE: 2.5 MM BLADE LENGTH: 20.5 MM TOTAL LENGTH: 58.5MM HANDLE SHAPE: OFFSET WRENCH KEY ADAPTER: NO INTEGRATED SQUARE: NO TO HIT: NO ROTATING CAP: NO INSULATED VDE: NO CURRENT VOLTAGE DETECTOR: NO MAGNETIC: YES FLEXIBLE: YES