Blank Length: 40, Length: 137, Weight: 14.4
From Amazon
Wera 05118074001 0.05 x 40 mm 2054 Screwdriver for Hexagon Socket - Silver
Conrad Electronic
Wera 2054 Electrical & precision engineering Allen wrench Spanner size (metric): 1.27 mm Spanner size (inch): 0.05 inch Blade length: 40 mm