Pcb drills at Lidl !

Lidl, that ephemeral stocker of eclectic things, is selling pcb drills at the moment.

At least, my local one is.

They are branded ‘Parkside’ (a lidl own-brand) and are in packs of 10 assorted sizes, for £4.99 per pack.

Their shelf position suggested to me that they are not this week's stock.

I could find three ranges, each in 0.1mm steps:

They are most quickly differentiated by the narrow coloured stripe running down on edge of the pack (dark blue in photo).

I have no idea what the metal is, nor have I had a chance to try them, yet. The wording is: ‘for printed circuit boards, plastic or acrylic glass’ max rotation speed 10,000rpm – does the speed give any clue to material?

They are marked with ‘OWIM’ and their size on the plastic collars. Web searching ‘owim’ does not yield much – it seems it might be a company with headquarters in the same building at Lidl's in Neckarsulm, so it might be a subsidiary – in short, is says nothing I can deduce about the drill material.

Btw, if you are not used to using these things, the small ones have to be run very fast or they break – don't ask me how I know…