These very simple holders use far less space (1 Multiboard ‘unit’ / 2.5cm wide)  than other plier holders that mount the pliers flat on the wall.  They will work for most normal sized pliers.

2 versions attached: 

• 15.5mm - ‘normal’ pliers
• 19.5mm - for pliers with over molded handles 

And yes of course you could call this model a pen holder as well… :-)

This holder uses Multiconnect connectors. 2 of them is sufficient.

Multiconnect is much stronger than Multipoint. The connectors are tool-less and very easy to move. The model locks the connectors securely in place.

I prefer these connectors. Thanks @JLokrin!

Printing: Models are in the right orientation - no support(s) needed but you will need good bed adhesion.