I bought a new set of drill bits the other day, and there's a hollow plastic tube with a spring inside - any idea what it is and how it works? I'm guessing something to do with centring?
Edit to add - I've no idea what to call the drill bits in general, but it's this set (Erbauer 4659X): https://www.screwfix.com/p/erbauer-straight-shank-mixed-drill-bit-set-50-pieces/4659X?tc=TT2&ds_kid=92700055262507123&ds_rl=1244066
Also, looking at that site, I think it's something called a screw starter - still not sure what it's for though...
Posting an image...