M3 spanner

myminifactory

I used SketchUp to create this M3 spanner and you can download the file if you want to scale it up to other sizes. I didn't write the size into the part because I wanted to keep things flexible. For getting under my printer's heatbed, I use this spanner to tighten one or two bolts. Since my printer has a magnetic heatbed, a plastic spanner made it much easier without scratching the underside. It was printed on my Prusa MK3 and took about 11 minutes at .2 layer height with 20% infill. The dimensions of this spanner are 90mm long and 3.5mm high, making it simple yet strong. It fits the M3 bolt perfectly on both ends, providing a secure hold every time.