Heres a link to one of the Stihl sites, it shows the different cutting
heads
you can get, pity I did not find it before I went to the shop.

http://www.stihlusa.com/trimmers/blades.html

Regards

Chris.

Thanks for the link, Chris. Just to confirm, the Brush Knife is the one that
I have.

The Polycut Head looks as if it might be useful for thinner stuff, mind. Now
you've got me started...... :-)

Regards

Howard Neil