It includes knobs for the five most common metric nut and bolt sizes: M6, M8, M10, M12, and M16. Of course, you can also resize it to fit bolts of other sizes.

On my old printer, I had to use a skirt to print, but my Bambu A1 printer can print on both textured and smooth print boards without using a skirt.

I tend to misuse these knobs by installing them on store tools or using them outdoors. Therefore, I usually print them using PETG material, a thicker shell layer, and a denser packing density. I have a set of knobs that have been used outdoors in chicken coops in the Pacific Northwest