One Set Is Enough: Our diamond hole saw set Fully capable of meeting most drilling needs and 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 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 the drilling speed and pressure and increasing the use of 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 3/32inch to 3-1/4inch, which is enough 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: 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/ 0.79inch, 22mm/0.87inch, 25mm/0.98inch, 26mm/1.02inch, 28mm/1.1inch, 30mm/1.18inch, 40mm/1.57inch, 50mm/1.97inch. 1 single suction cup tile hole locator, 1 used Screwdriver for cleaning debris left in hole saw after drilling size: About 19cm long Material: plastic+metal colour: As shown Package Contents: 1 x drill bit set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.