I prefer these cone type prop adapters to the collet types as they only require one tool on the filed (e.g. a hex drive) to change your propellers. To keep them well on the shaft, just grind a flat on the axle with a dremel and don't forget to use thread glue like Loctite 243 on set screws.
4 Stars because it's not the correct size. It's too small for 3.2 MM shafts and will have to be drilled out a little, if you plan on using it on 3.2mm shafts. I used a 1/8" bit which seem to work fine for me.