Conformity to Standards IS : 844 Part 1 and Part II latest BIS Marked No Type of Screw Drivers Engineers Screwdrivers Screw Driver Point Size or Tip Size (a x b) in mm x mm 1.5 x 10.0 Shape of Blade Round Length of Blade in mm 400 Size of Head M 6 Weight of Screwdriver in gms 375