This 8-piece set includes countersunk drill bits, 90 high-speed steel countersunk drill bits, titanium alloy drill bits, and titanium chamfered screwd

8-piece set of 90° high-speed steel chamfering drills, titanium coated, suitable for DIY, home, and general construction.: Titanium-coated chamfering cutters are ideal for milling and chamfering. They have a wide range of applications, suitable for metals and some non-metallic materials such as stainless steel, steel molds, iron, copper, aluminum, carbon steel, thin iron plates, insulating boards, PVC boards, and wood boards. The milling cutters are made of carbon steel with a titanium-plated surface. They are robust, durable, rust-resistant, and have a long service life. High-quality cutters: Standard sizes are suitable for various commonly used drill bits, including vertical drills. Concentric cutting edge: Angle greater than 90°, making it easier to use and extending its service life. The 90° acute angle and precise drilling pattern facilitate accurate drilling.