chasers are on the market besides the angle grinder type and the good old
bolster chisle.

Reason being I'm bored as most of me DIY work is done and I have an idea
that If I can come up with a good drawing of it this could go into
production if I have the inclination to carry it forward. :-)

I'm suprised nobody in the ideas tool industry has thought of this?

Go on make me day.

--
Sir Benjamin Middlethwaite