I was looking for something to work on the hardware clock, glasses, smartphones, etc. I never had the sufficiently small allen wrench, screwdriver handle fine enough to enter the screw wells ... Today it's done with this case! I almost forgot, there is also a small but powerful magnet that attaches to the end of the handle of the screwdriver. It's very convenient to get a screw fell to the bottom of the case to be worked out or that dirt we screw unscrewed, but remains stubbornly stuck in the screw shaft bottom. All the same - and the product has nothing to do - sometimes I still lack a second identical tool to lock the bolt to (un) tighten the nut .... I'll buy a second!