The operation is simple and only requires water lubrication. Bring you more convenience. High-quality steel and diamond dust coating, hard, durable, good working performance, and long service life. Widely applicable, very suitable for glass ceramics, marble, tile granite, etc. The nickel-plated diamond dust coating provides excellent performance and excellent cutting resistance. The holes are neatly cut, with no edge bending, no wobble, low cutting resistance, fast drilling speed, and easy chip removal.