Many device have a different nut and bolt size, that's why you need a screwdrivers sets to make it up. They are a set of many different size and shape that will fit with any device you want to open.
This made from fine material, a stainless steel with chrome layer to make a perfect impression and precision in engineering. They are made in Germany by the way.
Having this set is a must, you can do anything you need to do with them. They are portable and lightweight. You can keep it in your house or your garage.
