A 'step drill' works well in thin sheet metal. Much better than a normal twist drill. Places like Home Depot have them.
There's a picture of one at: http://www.widgetsupply.com/Power-Tool-Accessories/drill/step-drill-bits/BCZ24-2.jpg
A 'step drill' works well in thin sheet metal. Much better than a normal twist drill. Places like Home Depot have them.
There's a picture of one at: http://www.widgetsupply.com/Power-Tool-Accessories/drill/step-drill-bits/BCZ24-2.jpg