In many workshops the same problem always appears: wrenches disappear exactly when you need them.
Instead of searching for the correct tool every time, I designed a compact multi-size wrench that combines the most commonly used metric sizes in a single 3D printed tool.

This wrench includes six of the most frequently used metric sizes:

8, 10, 12, 13, 14 and 17 mm

These dimensions were chosen because they cover a large portion of everyday hardware used in:

• general workshop work 
• automotive repairs 
• furniture assembly 
• DIY mechanical projects 

Why these sizes?

The selected sizes correspond to very common bolt standards:

Including both 12 mm and 13 mm is particularly useful because many automotive components use different standards for M8 bolts.

Design Goals

The wrench was designed to be:

• compact
• strong enough for light mechanical work 
• easy to print 
• convenient to keep multiple copies around the workshop 

By printing several of these tools and leaving them around the workspace, you will almost always have the correct size nearby.

Specifications

• Length: 165 mm 
• Thickness: 5 mm 
• Material: PETG 
• Sizes: 8 / 10 / 12 / 13 / 14 / 17 mm 
• Type: Multi-size metric wrench 

Printing Settings

Recommended settings:

• Material: PETG 
• Nozzle: 0.4 mm 
• Walls: 4 perimeters 
• Infill: 30% gyroid 
• Layer height: 0.2 mm 

PETG offers a good balance between strength, flexibility and durability, making it suitable for light-duty workshop use.

Tip

Printing several copies and placing them around your workshop or toolbox ensures you always have a wrench available when needed.