FAQs

Frequently Asked Questions


For hole saws or circle cutters, attach them to the drill using the appropriate arbor/mandrel, ensuring it’s tightened securely before use.

It has a sharp center point and often spurs on the edges.

Look for a silver or gray insert at the cutting edge—different from the bit’s main body.

The cutting edges will be visibly brazed onto the steel body, often a different color or texture.

Metal hole saws have fine, hardened teeth or carbide tips; wood hole saws have larger, aggressive teeth. Check the packaging or markings.

Wood bits have a point and spurs; steel bits are blunter with a chisel edge for cutting metal.

Clamp a scrap board over the existing hole, drill through the board to keep the saw steady as it enters.

Flat (spade) bits are faster and cheaper; hole saws cut cleaner and handle larger diameters better.

Yes — hammer action chips the material as you drill, making the process faster and easier on the bit.

Mostly, yes—they’re optimized for through holes, but with careful depth control, they can be used for blind holes.