1、Excellent Cemented Carbide Material: This twist drill bit is made of excellent cemented carbide material to ensure the bit is super hard, incisive and effective cutting, with impressive cutting performance on metal, plastic, wood, etc. and long tool life. 2、Accurate Treatment Drill Bit: This straight shank drill bit is accurately treated to give the bit long lasting toughness, withstand heavy duty operation, resist erosion, and better lubricate the bit for stabe cutting. 3、Wide Application: This twist drill bit has a wide range of applications and can be used for marble, ceramics, glass tiles, floor tiles, concrete drilling and so on. 4、16. 2mm Blade Length: This metal twist drill bit adopts 16.2mm blade length, which can meet your different needs of use, which is very practical. 5、Compact And Portable: This metal drill bit is small in size and light in weight, which is very convenient to carry around with you and use.