Summary

5.5mm wrench good for M3 hex heads.

Added a hole in the base of the socket for long M3 screws

It's basically impossible to buy such a small wrench in stores. This is the best model I've tested so far but it just needed the one more bit I added to it.

Print Settings

Printer Brand:

Wanhao

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Wanhao Duplicator i3 Plus</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.15</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>90%</p></div></p>                                                    <strong>Filament:</strong> MatterHackers HPPLA                Clear                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>4 walls, 1mm tops and bottoms. 90% infill. You want it solid so it cannot flex.</p></div>

5.5mm wrench (for M3 HEX) with hole