Review on Uxcell Drill Cutter Metal Alloy Cutting Tools in Hole Saws & Accessories by Chad Judex

Bought this first for cutting plastic but needed to drill a 2" aluminum panel. Worked great, the trick was to use lots of cutting fluid and a few cuts to allow the drill to clean up. Dirt. Clean after each hole, aluminum also tends to build up in teeth. A few teeth ended up with chips, probably because the chisel wasn't cleaned between passes. (only visible when viewed through a microscope) but still cuts great Hard to beat for the price.