Review on HUHAO Cobalt Circuit 0 2 1 1Mm Diameter by Brian Cheney

Shafts are strong enough, but the bits are tiny, I mean really tiny, which you can't appreciate until you see them (see attached picture with price in US dollars). Bought these for drilling circuit boards for personal projects. They're tiny and fragile to handle, but when fitted into my cheap Harbor Freight drill, they didn't bend or wobble, but cut cleanly and easily through the circuit board material. Move slowly and don't push too hard (especially from the side) like you would with any small drill. Thanks to other reviewers who mentioned the case being difficult to open, I agree and have held it firmly to the desktop while opening.