Ultimate Parametric Box Wrench | Metric & Imperial

Looking for that one specific wrench size you lost? 

This is a fully parametric Box-End Wrench generator. It creates a robust, print-ready tool with professional rounded edges (fillets) and custom engraved text.

Just remember—metal will always beat plastic, so this isn’t for high-torque jobs.

Features:
Dual System: Switch instantly between Metric (6mm - 32mm) and Imperial (1/4" - 1") standard sizes.
Socket Type: Choose 6-Point (Hex)  or 12-Point (Double Hex).

Strong handle: The handle wraps around the entire round section to provide maximum strength.
Comfort Grip: Features calculated fillets (rounded edges) on the handle for comfort—no sharp 3D printed edges digging into your hand.
Perfect Fit: Includes a Clearance option.
 

Printing Instructions:
Orientation: Prints flat on the bed.
Supports: NO supports required.
Walls/Perimeters: Recommend 4 to 6 walls. The strength of a wrench comes from walls, not infill.
Infill: 40% to 100% (Gyroid recommended).
Material: PLA is fine for light tasks. For heavy-duty torque, use PETG, ASA, or PC (Polycarbonate).

How to Customize (MakerWorld):
Click the "Customize" button on this page.
Select your Units (Metric or Imperial).
Choose your Size from the dropdown.
Adjust Clearance (0.2mm is a good starting point for most printers).
Hit Generate and Download!

Also check out some of my other 160+ designs: 

John_M | Published - MakerWorld