Over at the main ToolGuyd website, Stuart listed some deals going on right now
I posted about a Lenox plug ejector arbor:
I also talked about a variety of alternative types of hole saw styles that are available.
I said this:
“This style of bi-metal hole saw – be they from Milwaukee, Lenox, Dewalt, Starrett. Morse, Diablo, Bosch or others are rather ubiquitous – because they can cut a variety of materials. Their disadvantage is that they cut relatively slowly, can only cut so deep and retain the plug – sometimes making it difficult to eject it (as Hang Fire notes).
There are other styles based on the same sort of cup as the holder of cutting teeth or cutting edges. Milwaukee Big Hawg Style use 3 carbide teeth. Bosch also makes a 3 tooth style. Lenox sells a style called “One Tooth”, These all can be had individually or in kits. A lesser known (in the US anyway) brand is Pro Fit (made in the Netherlands) . Bosch, Lenox, Starrett , Blu-Mol and others make short cup hole saws with ejector springs specifically designed for cutting sheet metal. Ideal, Klein and Greenlee sell styles that are focused on cutting hole in electrical boxes and panels. Several manufactures make style with carbide teeth – or no teeth at all – rather using carbide or diamond grit edges to cut harder materials – possibly things like cast iron or ceramic tile. Center drills for there are usually also carbide tipped. For tile and stone cutting there are annular cutters that are meant to be threaded onto the arbor of an angle grinder -some meant to cut dry and others using water as lubricant and flushing agent. Other larger sizes are meant for use with specialized core drilling machines. For metal cutting – with magnetic drill presses – the Rotabroach cutter is favored over twist drills for larger sized holes.”
I thought some links might be handy for some of the alternatives that I talked about.