Product Name: 70mm Diamond tip drill bit, 70 mm Glass hole saw bit, Glass drill bit Hole Diameter: 70mm (2-3/4”); Shank Diameter: 10mm (3/8"); Total Length: 55mm Suitable for use in drill hole on glass, tile, ceramic, stone, marble or granite These diamond drill bits made of high-speed steel, Excellent for making clean and accurate hole The hole does not need further work because the cut is clean, Start drill at 45 degree to surface and align to 90 degree as hole forms,

Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter(Approx.) : 10mm/0.393";Shank Hole Diameter : 4mm/0.15''; Total Length : 50mm/1.967";Color : Silver Tone Weight : 46g