Feature: 1. U‑drill shank drills multiple short chips, and can use the internal cooling system to safely remove chips, conducive to the continuity of work 2. Hole made by drilling has good surface finish and small tolerance range, which can be used instead of some rough drill 3. Drilling technology can not only reduce drilling tools, but also because of the way the head is inlaid with cemented carbide, make its life more than ten times that of ordinary drills 4. Cemented carbide material have high hardness, wear resistance, strength and toughness 5. U drill shank possess stable structure, excellent performance and long service life Specification: Item Type: U Drill Shank Specification: C25-3D16-51WC03 (16x3 times the diameter) Material: Carbide Outer Edge Angle: 45° C25 represents the handle, Straight Handle Thickness: Approx. 25mm / 1in 3D16: 3D represents 3 times the diameter, represents the blade length, Diameter: Approx. 16mm / 0.6in, 3D16 represents 3x16 = approx. 48mm / 1.9in(blade diameter length)51: Represents the effective processing depth . Package List: 1 x U Drill Shank1 x Screwdriver1 x User Manual