Frank Stacey wrote:
I want to remove a bolt which takes a 4mm hex alan key - well it's
not quite that simple. The hex hole has a central pin which prevents
the insertion of a standard alan key.

That' "allen" key. CK Tools do a set of Hex bits with holes, I bought a set
last week at my local (proper) tool shop for about £3:50.


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257