- [BOHRER-SET] This versatile set includes five countersink drill bits in common sizes (2 mm to 6 mm), ideal for a variety of tasks, whether you're working on woodworking, metalworking, or plastic applications. - [MATERIALS] Crafted from HSS 6542 high-speed steel combined with carbon steel, these bits are designed for durability and long-lasting performance across multiple surfaces, ensuring they withstand rigorous use. - [SECURE HEX SHANK] The 0.35 mm (1/4 inch) hex shank provides a firm grip with your drill, reducing slippage during operation and enhancing precision in your projects. Use Cases: 1. Perfect for creating clean, smooth countersinks for screws in woodworking projects, ensuring a flush finish. 2. Ideal for metal fabrication, allowing for precise hole preparation and an improved fit for fasteners. 3. Effective in plastic applications, providing accurate countersinking to prevent cracking or chipping. With this countersink drill bit set, you gain the reliability and versatility needed for professional-quality results in your projects.