Features M14 Female Thread Design: The hole saw is designed in M14 female thread, the handle is slip proof, has large torsion and high bearing capacity, and is very easy to drill. Excellent Performance: The m14 angle grinder hole openers have thickened emery coating, uniform coating, improve wear resistance and life of hole opener, open hole is neat, smooth, no broken edges, no need to add water, incisive, can drill deep holes stably. Wide Application: The hole saw ensures a clean and accurate hole on hardest and abrasive materials like tile, granite, marble, glass, and other stone. Fine Portable Case: The 6pcs diamond drill bits come with a compact box where the bits are not in use. You don't have to worry about the missing of any of them. Sturdy and Durable Materials: The cutting blade of the diamond hole saw is made from a premium grade of diamond that delivers more effective performance than traditional carbide, or bi metal hole saw. Specification: Item Type: Diamond Hole Saw Kit Material: Diamond Color: Gold 6pcs Hole Drill Diameter: Approx.20mm/0.8in, 20mm/0.8in, 27mm/1.1in, 35mm/1.4in, 55mm/2.2in, 68mm/2.7in Hole Drill Total Length: Approx.75mm/3in Hole Drill Sand Width: Approx.15mm/0.6in Hole Drill Working Length: Approx.55mm/2.2in Female Thread: M14 Diamond End Mill Diameter: Approx.20mm/0.8in, usable length: Approx.50mm/2in, overall length: Approx.70mm/2.8in Adapter: M14 male thread, 3/8in hex shank, overall length: Approx.60mm/2.4in, shank length: Approx.28mm/1.1in Scope of Application: Marble, glass, ceramic tile, granite and other stones Package List: 2 x 20mm Diamond Hole Saw 1 x 27mm Diamond Hole Saw 1 x 35mm Diamond Hole Saw 1 x 55mm Diamond Hole Saw 1 x 68mm Diamond Hole Saw 1 x 20mm Diamond End Mill 1 x Adapter 1 x Aluminum Box 1 x Manual Note: 1. Do not use these drills with hammer mode. 2. 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 tiles. 4. For horizontal drilling, just apply light pressure. 5. For vertical drilling, the weight of the machine will provide enough pressure. 6. Finger drills are used to enlarge, reshape or round the bevel of existing holes. 7. Please wear all applicable safety gear when using these diamond bits. Package List 2 x 20mm Diamond Hole Saw 1 x 27mm Diamond Hole Saw 1 x 35mm Diamond Hole Saw 1 x 55mm Diamond Hole Saw 1 x 68mm Diamond Hole Saw 1 x 20mm Diamond End Mill 1 x Adapter 1 x Aluminum Box 1 x Manual