The holder is designed for the PB 300.3 dead-blow hammer from PB Swiss. It has a head diameter of 32 mm and different brands with similar size probably work as well.
The holder is made to hold the handle some distance away from the wall such that the hammer can be retrieved and stowed quickly and ergonomically. This arrangement also utilizes very little wall space.
Two 3 mm wood screws are used to fix the holder to the wall.
The author hasn't provided the model origin yet.