I have too many hobbies. I work a lot with electronics and also do 3D printing (among other things). This collection of nuts and bolts is very handy. I've learned that it's best to have an assortment on hand. Being in the middle of a project and realizing that a little detail you need is missing is just the worst feeling. Nice little compact box with a good set of nuts and bolts. Good quality - so far they have worked perfectly.