This model is meant to be printed standing up. This is not ideal for shear strength, but for this small screwdriver it seems sufficient. 
I had the best result printing with organic supports - the part lifts up from the sheet, leaving the supports behind. 
Use scarf seam settings to hide the vertical seam.

Pictured example: 
Filament - Prusament PLA Pristine White

Nozzle - 0.4 mm

Layer height - 0.2 mm

Supports - Organic

Printer - Prusa MK4S