well, a lot of people don't use SAE sockets for serious stuff. Your IKEA chair might have some 9/16ths wrenches - but for cars and other mechanicals its mostly

well, a lot of people don't use SAE sockets for serious stuff. Your IKEA chair might have some 9/16ths wrenches - but for cars and other mechanicals its mostly metric. A few brake lines and some old exhaust bits might be SAE, but by and large vehicles are done with metric. Personally I like that SAE has fewer sizes... Its frustrating as hell working on cars with a mixmatch of 6mm 7mm and 8mm bolts. oh this is a 15 but a few awkward 16s! Mostly though, cars are pretty standard. European cars seem to be basically - 7mm 8mm (hose clamps and other tiny stuff) 10mm (air filter housings and such where 8mm is to small) 12mm 13mm (misc bolts, intake manifolds, exhaust, almost everything) 15mm 17mm 19mm (these larger ones are basically suspension and other large components)