2pcs 23mm Diamond Coated Hole Saw Drill Bit for Glass, Ceramic Tiles, Marble, Rock, Porcelain

SIZE - Drilling diameter 23 mm (0.9 inch), shank diameter 8 mm (0.31 inch).

DIAMOND COATING - The diamond coating improves drilling speed, making the drill bit sharper.

NICKEL-PLATED SURFACE - The nickel-plated surface can extend the life of the drill bit and improve its corrosion resistance.

SPECIAL DESIGN - The split edge makes it sharper and works more efficiently. The open side allows debris to be removed to keep the drill bit clean.

APPLICATIONS - Perfect for drilling glass, ceramics, porcelain, ceramic tiles, porcelain tiles, limestone, slate, marble, clear stone, and fiberglass. (Must be used at low speed; always use lubrication (water) during operation, otherwise the hole saw will burn out.)