【6 Different Sizes】 5mm, 6mm, 6mm, 8mm, 10mm, 12mm, these glass drill bits are perfectly suited for various drilling tasks, with high drilling accuracy and smooth chip removal. 【High-Quality Materials】: Made of high-quality hard alloy, it has also undergone anti-rust treatment and reinforced heads, which can prevent the drill from cracking and is durable. 【Cross-Shaped Design】: The unique precision cross-angle spear point reduces slippage and walking; a premium tile cutter that cuts through ceramic tiles like butter, extremely clean and fast. 【Wide Application】: It can be installed on electric drills, bench drills, power drills, and corded or cordless power drills. It is suitable for drilling tiles, glass, porcelain, blocks, marble, brick, concrete, plastic, wood, walls, masonry, and mirrors.