Carbide Hole Cutter Set 4 Piece KLEIN TOOLS 31872

Set comes with 3 hole saws and one spare bit that pilots in the centre. I broke one bit the first time I used the hole saws on some mild steel, 4mm thick. Then I’ve used all three of them maybe 2/3 times since. In that time, the middle one has shattered or chipped every single one of its cutting edges, you’d think these were made of glass.

Can cut through SS cabinet and thick 65ft lamp post easely. Use it a lot for work. Recommends!

This is a very nice product for anyone that does electrical work. It has the sizes you will need for most clamp connectors and conduit. Cuts through the metal box very smoothly with no sharp edges.

This type of product works very nice and with the spring pushing the slug out after nice. Just can not use on any angle, must be straight on. I broke two of the bits and had to buy replacements. It does come with a spare. Very nice set and cuts well for electrical boxes/panels. So main limitation is must be straight into your surface, which may not always happen.

Buy 7/32 drill rod and make your own pilot bits! 1-7/8 long. This will prevent the pilot from walking inside the hole and snapping off. You should be drilling your holes out first and starting your carbides flush to the metal with cutting oil in LOW SPEED. When used properly by a tradesman these carbides are excellent. Its not the bad product its the BAD TRADESMAN!

Nice and slow. These bits are badass I’ve had zero problems with them. Should of got the bigger set