Feature: 1. High Performance: The hole saw is designed with M14 female thread, the handle is anti slip, with large torsion and high bearing capacity 2. Thickened Emery Coating: The hole drill bit is coated by thickened emery uniformly, which improves the life, can be used stably 3. Robust and Durable Material: The cutting blade of the diamond hole saw is made of high quality diamond for more efficient performance than conventional carbide or bimetal hole saws 4. Aluminum Box Storage: The hole saw is preserved in an aluminum box, which is rust proof and anti corrosion, the box has a smoothly and high end appearance 5. Application: The hole saws drill holes neatly and smoothly, without broken edges, no need to add water, sharpness and wear resistant, which is suitable for marble, glass, ceramic tiles, etc. Specification: Item Type: Diamond Hole Saw Kit Material: Diamond Color: Gold Aperture: Approx.20mm/0.8in, 35mm/1.4in, 40mm/1.6in, 45mm/1.8in, 50mm/2in, 68mm/2.7in Head Height: Approx.15mm/0.6in Working Length: Approx.40mm/1.6in Overall Length: Approx.60mm/2.4in Female Thread: M14 Scope of Application: Marble, glass, ceramic tile, granite and other stone. Package List: 1 x Diamond Hole Saw Kit1 x Aluminum Box1 x Manual Note: 1. Do not use these drills with hammer mode2. Install these bits on a corded drill, not a cordless drill (doesn't have enough power)3. Only for tile drilling, not recommended for materials behind tiles4. For horizontal drilling, just apply light pressure5. For vertical drilling, the weight of the machine will provide enough pressure6. Finger drills are used to enlarge, reshape or round the bevel of existing holes7. Please wear all applicable safety gear when using these diamond bits