Móc Len (Crochet Hook) 7 & 10 mm

Print with enough wall thickness so the hook end is solid. 
Orient the part so the main flat end is against the build plate. It should print fine without support using a 0.4mm nozzle and 0.15 layers. 1.2-1.6mm walls and 25% infill works well. 

This is obviously a rough construction and a metal hook is going to be more precise and smoother for long term use, but if you need a few extras to teach techniques to a group these might work for you. 
If you do plan to use it regularly, I recommend sanding it down a bit so the yarn doesn't catch on the shaft.