Every printer I own has, at some point, required me to lie on the garage floor holding a flashlight in my teeth while trying to get an M3 screw back into a bracket I couldn't actually see. This is apparently the hobby. Nobody puts that part in the marketing photos.
For years my answer to this was a cheap jeweler's screwdriver set with a handle that spun about as freely as a rusted gate hinge. Then I came across this rechargeable electric screwdriver kit while restocking, bought it for testing purposes, and have not touched the manual set since. Testing purposes.
The actual spec sheet part
It's a 500mAh lithium cell driving a motor at 150 RPM, with forward and reverse rotation and an electric torque of 0.3 Nm. That number is deliberately gentle, which matters more than it sounds. Precision electronics don't want a power tool, they want something that spins the screw for you and stops well before it strips the threads out of a printed part. When you do need real force, the handle takes over at 3 Nm of manual torque, so it works as an ordinary driver the moment the motor isn't enough.
The bits are CRV steel, 38 of them, and the case throws in 6 disassembly picks for prying open the things that were never meant to be opened. It charges over USB-C, which in 2026 should be table stakes and somehow still isn't. My favorite detail is the small magnetizer and demagnetizer block built into the set: drag a bit across it and suddenly the screw comes out attached to the driver instead of falling into the printer frame, never to be seen again.
Why it's actually useful here
If your build volume is full of M3 hardware, this is the tool you didn't know was missing. Hot end swaps, belt tensioner adjustments, motherboard access panels, that one bracket at the back of the Y-axis that requires three hands: all faster, and all with noticeably fewer chewed-up screw heads. It's equally at home on a laptop, a game console, or whatever you promised someone you could definitely fix.
At the time of writing it's sitting at $21.72, down from $47.21, and it holds a 4.9-star rating across more than 1,800 reviews and 5,000-plus orders, which is the kind of number that suggests people aren't just buying it, they're keeping it. Check it out here, and may your next screw never roll under the workbench again.