Rustark 4Mm 45Mm Assortment Porcelain Drilling Review

💎【Diamond Hole Saw Drill Size Assortment Set】The set contains 20 sizes of hole saw drill, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm,22mm, 25mm, 28mm,30mm, 32mm, 35mm, 40mm, 42mm, 45mm, 50mm, 1 pcs each seize drill bit, coming with 2 pcs maker pen in red and black, totally 22 pcs. Full size assortment set will meet your various needs, saving your money and energy. 💎【Update Hole Saw Drill】Manufactured by premium and thick diamond sands, thickened sand layer and uniform coating make sure wear resistance, improving service time. The diamond coated material makes sure the bit more sharp, enhancing the drill speed. Moreover, nickel plating surface can enhance the surface corrosion resistance. 💎【Premium Design】The incision design is smooth without any burr, reducing the resistance, removing chip quickly to keep the drill bit clean. Shank size is 3/8 inch for standard drills, fitting for almost power drill, convenient to use. Inside guide will help to keep the hole saw in position and make a water pool. Depth of cut 30% deeper than standard. 💎【Do NOT run dry】Need to be used at a low speed. Pls continue to add water to keep the drill bits cool when processing,otherwise the hole saw will burn or the item will be broken. 💎【Widely Application】Work great on drill glass, porcelain tile,ceramics, porcelain, ceramic tile, limestone, slate, Fish Tanks, marble, granite, light stone, Pot, fiberglass and and many types of Stones.NOTE: NOT suitable for Tempered Glass.