Usage Tips: One Set Is Enough: Our diamond hole saw set is fully capable of meeting most drilling needs in the workplace. Strong and Sharp, Long Service Life: The diamond drill bit set is made of high-quality materials, strong and durable. The surface adopts a high anti-corrosion electroplating process, and the top is thickened with diamond coating to provide excellent cutting strength and achieve high-precision and smooth cutting. Reducing drilling speed and pressure while increasing water lubrication will greatly extend the service life. High Suction Power for Precise Positioning: The opening length of the adjustable hole saw guide clamp ranges from 3/32 inch to 3-1/4 inch, sufficient to accommodate hole saws. The suction base is strong and can be firmly fixed on smooth surfaces. Package Content: Professional integrated steel diamond hole saw set: 6mm (0.24 inch), 8mm (0.31 inch), 10mm (0.39 inch), 12mm (0.47 inch), 14mm (0.55 inch), 16mm (0.63 inch), 18mm (0.71 inch), 20mm (0.79 inch), 22mm (0.87 inch), 25mm (0.98 inch), 26mm (1.02 inch), 28mm (1.1 inch), 30mm (1.18 inch), 40mm (1.57 inch), 50mm (1.97 inch). 1 single suction cup tile hole locator, 1 screwdriver for cleaning debris from hole saw after drilling. Size: Approximately 19cm long Material: Plastic + metal Color: As shown Package Contents: 1 x drill bit set Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. Measurement may vary by +/- 1-3cm.