- Complete set of 9 HPMAISON JY-8841 masonry drill bits, designed to drill a wide variety of materials such as tiles, ceramics, brick, concrete, glass, wood, marble, and more. - Made of YG6X alloy with tungsten carbide tip, they offer high wear resistance and longer service life. - Four-edged cross head design reduces slipping and improves drilling accuracy. - 1/4" hex shank for quick change and firm grip in electric and bench drills. - Includes assorted sizes: 5 mm (2 pieces), 6 mm (4 pieces), 8 mm (2 pieces), 10 mm (1 piece), 12 mm (1 piece), covering the most common needs in DIY and construction work. - Anti-rust treatment protects the drill bits and ensures optimal performance for longer. - Compatible with most brands of electric and manual drills. - Ideal for clean and fast cuts, minimizing the risk of chipping in delicate materials.