The3rd Earl Of Derby wrote:
a market stall with these on offer for 5GBP new in the box or 3.50GBP for
ones that had something missing like an handle or the guide rail. :-)

http://www.20xx20.myby.co.uk/P3080003.JPG

Yep they do work.

Mind your fingers. Have you had one before?

You can often get 1/2" bits for a Pound, too. Is it
a 1/2" machine?