DescriptionThese drill bits adopted of reliable material and fine crafts havebetter working performance. These drill bits are designed for smooth and precise drilling on tiles, marble, porcelain, metal, etc. Enough quantity can fit your different needs, bring you much more convenience.Features-Color: As shown -Material: Steel -Size: 19.80X2.00X2.00cm/7.78X0.79X0.79in -Size: 14.30X1.40X1.40cm/5.62X0.55X0.55in -Size: 14.30X1.20X1.20cm/5.62X0.47X0.47in -Size: 12.00X1.00X1.00cm/4.72X0.39X0.39in -Size: 6.00X0.30X0.30cm/2.36X0.12X0.12in -Size: 1.20X0.80X0.80cm/0.47X0.31X0.31in - Feature excellent and exquisite craftsmanship, these drill bit are carefully polished and have good texture.- Easy to install without slipping, can be matched with different kinds of drills to fit your needs.- Good workmanship for good details, sturdy and durable, can serve you well.- These practical tools are widely used for drilling ceramic tiles, concrete, bricks, metal, etc.- Hard and tough, durable and wear-resistant, not easy to deform or break, offer you a good service.