Customized version of http://www.thingiverse.com/thing:91035

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=91035

Using the following options:

Drill_Bit_Diameter_Units = 1
Handle_Length = 80
Set_Screw_Nut_Thickness = 3
Set_Screw_Nut_Diameter = 5.5
Drill_Bit_Diameter = 8
Resolution = 25
Drill_Bit_Length = 20
Handle_Diameter = 20
Number_of_Nut_Traps = 2
Set_Screw_Diameter = 3