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12PCS Masonry Drill Bits Set, Professional Masonry Bit Tile Drill Bits Set Concrete Drill Bit, 4mm to 12mm SPECIFICATIONS Material: metal alloy Size: 12.3cm/4.8inch/12mm 12cm/4.7inch/10mm 11.2cm/4.4inch/8mm 10cm/3.9inch/6mm 9cm/3.5inch/5mm 8cm/3.15inch/4mm Qty.:12PCS PACKAGE INCLUDED: 12 x Professional Masonry Bit (comes with 6 different sizes) VALUABLE SET Our Masonry Drill Bits Set comes with 6 different dimensions, can meet different needs, well made, professional welding, anti-wear and heat-resistant WHY CHOOSE US Upgraded Tech - Top grade quality cemented carbide with a reinforced head that prevents bit cracking and provides a longer life. Strong toughness and wear resistance. Custom Triangle Spear Tip - solves drill bit wander and slipping. Faster drilling. Like a hot knife thru butter. Multiple Occasions High-quality material plus ergonomic design make the drill bits suitable for eramic tile, glass, cinderblock, hard plastic, cement, Cconcrete, mirrors, windows, travertine, brick, wood, terracotta, stucco, steel, laminate flooring, garden pot, marble, pickguard, etc. The drill bits can be installed and used in general drill, electric drill, hand drill and bench drill, etc.