ZFYQ Hole Saw Drill Bits Set, Diamond Drill Bit Set Cutting for Glass, Ceramic, Porcelain, Tile, Marble, Ø6mm-50mm, 15 Pcs

【15 Cutting Diameters:】6 mm, 8 mm, 10 mm, 12 mm, 14 mm, 16 mm, 18 mm, 20 mm, 22 mm, 25 mm, 28 mm, 30 mm, 35 mm, 40 mm, 50 mm. 【Precision design:】The Diamond Drill Bit's side holes help to easily remove waste and also speed up cooling; the surface of the bit is nickel-plated for improved corrosion resistance; and the thick, uniform Diamond Coating Top ensures that fast, hard-wearing drilling can be guaranteed. 【CUTTING MATERIALS:】It is suitable for drilling holes in tiles, glass, ceramics, marble, limestone and light granite. Works with most electric and impact drills. 【Cutting technique:】Draw the cutting position with a marker, drill slowly at a 45° angle, wait for the groove to appear, then drill slowly and vertically with a hole saw. Diamond drills do not have a centre point, so start from the edge when drilling. 【Kind Tipps:】When cutting, be sure to constantly refill the hole saw with water to avoid premature wear of the material being drilled and the tool, while drilling at a slow speed. This will extend the Lifespan of the diamond drill bit.