Description:5pcs 20-42mm Diamond Hole Saw Drill Bit Set for Tile Glass Marble Granite CuttingSpecification:          Material       High-speed steel           Blade diameter       Approx. 20mm\/0.78!#!amp!*!quot;、 26mm\/1!#!amp!*!quot;、 30mm\/1.18!#!amp!*!quot;、 35mm\/1.37!#!amp!*!quot;、 42mm\/1.65!#!amp!*!quot;           Blade length       Approx. 3mm\/0.11!#!amp!*!quot;           Length       50-50mm\/1.96!#!amp!*!quot;-2.16!#!amp!*!quot;           Shank Diameter       Approx. 7-8mm\/0.27!#!amp!*!quot;-0.31!#!amp!*!quot;           Quantity       5pcs     Features: -Diamond hole saw glass marble tile cutting. -High quality diamond blade、 durable. -Simply mounted on the ordinary hand drill can be used、 need to add coolant when drilling、 drilling force should be playful、 especially when at the beginning of the drill and to drill through. -Opening neat、 smooth、 no broken edges、 Britain does not produce shock phenomenon. -After notching easy decoration、 chip easily、 no distortion、 good stability. -Apply to ordinary glass tile openings、 rounded beads、 etc.、 mainly used for glass openings.  Package Included:5 x Hole SawMore Details: