Brand-new tool on your workbench: Calipers! It's a proper round micrometer. Spin the dial with your finger and the needle clicks along millimetre by millimetre. Land exactly on a standard metric thread size and the dial seats itself with a satisfying thunk, then tells you which bolt you've got, its pitch, and which drill bit to grab before tapping the hole. Too lazy to spin? Tap an M8 or M12 chip and the needle jumps there on its own. You'll find Calipers in your Profile. Decode the markings, measure the metal, all in one app. Spin it, click it, tighten it, and may all your threads seat on the first try!