Customized version of http://www.thingiverse.com/thing:1346951

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=1346951

Using the following options:

socket_size = 5.5
tolerance = 0.2
socket_detail = 100
depth = 10
socket_type = 6
socket_wall_thickness = 5
drive_wall_thickness = 3
drive_size = 6.35