I have already searched but i can't find enough information about it?
But have you already used it? Which one have you used?
Where did you buy it or can you make it self?
It is a geared extruder designed for 3mm filament that can't really be driven with current direct drive extruders.
Its a DIY extruder.... you print the parts get the other bits form a local hardware store/ebay and build it...
Most tricky part is the hobbed bolt... (also on ebay)