Alpha

Yes. Arbors match the holesaw's thread and diameter range, and the shank must suit your drill chuck. Check both before ordering. Match the product spec to the job conditions before you start.

Pilot-drill arrangement and thread size vary by model. Alpha's range covers its own holesaw sizes; pick by the holesaw you are driving, not by drill brand.

Match the arbor thread to your holesaw diameter range. The standard arbor covers small to mid saws; the large-thread arbor takes bigger diameters with a wider pilot bit.

Yes. The arbor drives diamond and bi-metal holesaws alike. Keep the drill speed low on tile and stone so the cutting edge does not glaze over.

Tighten the drill chuck firmly and seat the arbor pilot fully. A slipping arbor wrecks the holesaw thread and wanders off the marked centre point.

The thread and pilot pin wear with heavy tile and stone work. Replace the arbor when the saw wobbles at speed or the pilot pin no longer holds the saw square.