Tua vít LTT Stubby có ratchet

Mix of two models to add ratcheting mechanism from @Martin Rigatoni to LTT Stubby Screwdriver from @CheffHD. 

You will need two rachets, everything else is by one piece. 
Be careful with supports in handle - there is a tiny guide slots on inner walls, you'll get in trouble, if supports will melt in it. 
Assembling is pretty self explanatory with picture. Just put the rachets and the spring on its axes, then install shaft in the center. Align the switch according to picture and accurately push it down till it clicks. Voila, you're awesome!