Drilling steel box section

[woody]

Id try this one.

http://www.tooled-up.com/Product.asp?PID=124734&MAN=Plasplug-Dsh400-Compact-Drill-Sharpenerhttp://www.tooled-up.com/Product.asp...0-Compact-Dril l-Sharpener

The Bi metal hole saw should be fine.

[psycho_fling]

i searched on google and it came up with this, same one? just slightly cheaper

http://www.machinemart.co.uk/shop/product/details/dsh400-drill-sharpener/path/knives-multitools-2http://www.machinemart.co.uk/shop/pr...rpener/path/kn ives-multitools-2

[woody]

Looks the same.

Bi-metal saws do alu nicely. I have cut through 20mm thick alu with a 125mm hole saw and 350w cheap bench drill. It didnt even take much longer than 20 minutes. Just spray some cutting fluid or denaturized ethanol on it, so it doesnt melt the material.