I have designed this model as a filament and space saving alternative for the Gridfinity system. The model comes in two part. The first part is meant to hold the hammer's head an the other part was designed to holder the hammer's handle. Therefore this idea will only use two Gridfinity fields. This model was originally design for a hammer for the german hardware store “Obi” therefore the size and fitment of this hold can variate and might not fit every hammer. 

I hope you like the idea.