Item Type: U Drill Shank Specification: C25-4D16-67WC03 (16x4 times the diameter) Material: Carbide Outer Edge Angle: 45 C25 represents the handle, Straight Handle Thickness: Approx. 25mm / 1in 4D16: 4D represents 4 times the diameter, represents the blade length, Diameter: Approx. 16mm / 0.6in, 4D16 represents 16x4 = approx. 64mm / 2.5in(blade diameter length) 67: Represents the effective processing depth Package List 1 x U Drill Shank 1 x Screwdriver 1 x User Manual 1Udrill shank drills multiple short chips, and uses the internal cooling system to safely remove chips, which is conducive to the continuity of work 2The hole made by drilling has good surface finish, small tolerance range, which can be used instead of some rough drill 3The use of drilling technology can not only reduce drilling tools, but also because of the way the head is inlaid with cemented carbide, its life more than ten times that of ordinary drills 4Cemented carbide material possess high hardness, wear resistance, strength and toughness 5U drill shank with stable structure, excellent performance and long service life