Triangular Drill Bit Set – Comes with 10 drill bits and two small boxes, making them easy to carry and store. Available in 4 different sizes (4 x 6 mm, 2 x 8 mm, 2 x 10 mm, 2 x 12 mm), it is enough to meet your various needs. Durable and Long Lasting. Sturdy – Our tungsten drill bit is made of high-quality carbide, offering excellent abrasion resistance and extreme hardness. Its carbide tip is durable and easily penetrates all types of materials. Widely Used – Featuring high precision for center drilling, these porcelain drill bits are ideal for drilling holes in glass, tiles, mirrors, wood, ceramic, marble, brick walls and other hard and brittle materials. Special Design – The triangular drill bits, featuring a U-shaped housing, quickly remove dust while drilling, without slipping or leaving burrs. Their 3-sided shank allows for easy grip and a firm hold. Easy to Use – Can be installed in most drills. For common electric hand drills and bench drills, all drill bits are stored in the