Feature:1. The hole saw can be used on table drills, hand drills and drilling machines but not on impact drills2. Suitable for all kinds of stone, ceramics, vitrified brick, glass, etc. You should always add water to cool down the holes3. Advanced powder platinum production technology with vacuum sintering, greatly increasing the service life4. The segmented design of the drill bit has a small cutting resistance and is good for chip removal.5. Universal triangular drill shank can effectively prevent slipping during drilling and withstands greater torsion6. All specifications have chip removal holes, and the oblong design is more conducive to chip discharge.7. Position at an oblique angle of 45 first, and drill the hole vertically(note that the speed should not be too fast, and the speed should be slowly operated at about 8001000 rpm)Specification:Item Type: Hole Saw Drill BitOptional Style: 40mm, 45mm, 50mm, 55mm, 60mmOpener specificationsTotal product lengthHandle lengthHandle diameterWorking depth40mm / 1.6in83mm / 3.3in25mm / 1in9.4mm / 0.4in58mm / 2.3in45mm / 1.8in83mm / 3.3in25mm / 1in9.4mm / 0.4in58mm / 2.3in50mm / 2in84mm / 3.3in25mm / 1in9.4mm / 0.4in59mm / 2.3in55mm / 2.2in84mm / 3.3in25mm / 1in9.4mm / 0.4in59mm / 2.3in60mm / 2.4in80mm / 3.1in25mm / 1in9.4mm / 0.4in59mm / 2.3in.Package List:1 x Hole Saw Drill BitNote:Position at an oblique angle of 45 first, and drill the hole vertically(note that the speed should not be too fast, and the speed should be slowly operated at about 800-1000 rpm)