Features HIGH TEMPERATURE RESISTANT PLATING: Hole opener adopt excellent full emery plating, high temperature quenching, high hardness, incisive and durable SUPPORT DRY DRILLING: Realize dry drilling of bit by cooling wax, which can effectively transfer heat and prevent drill burning UNIVERSAL SHANK: Brazing hole opener with universal round drill shank, suitable for most electric drills, holding firmly APPLICABLE MATERIALS: Brazed drill can be used for granite, ceramic, marble, stone, glass, diamond coating and other hard materials 5PCS IN TOTAL: The package contain a total of 5pcs brazed hole saw, enough for you to replace and use, very convenient Specification: Item Type: Brazing Hole Opener Material: Diamond Weight: 87 g / 3.1 oz(approx.) Product Size: Approx. 10 x 10 x 2cm / 3.9 x 3.9 x 0.8in Application: Can be used for granite, ceramic, marble, stone, glass, diamond coating and other hard materials Package List:5 x Brazing Hole Opener Package List 5 x Brazing Hole Opener