Round Type Thermal Friction Hot Melt Short Drill Bit M3 M4 M5 M6 M8 M10 M12 M14 Flow Drilling Tungsten Carbide Friction Drill. Specification: Material: Tungsten Carbide Color: Silver Type: Flat Type Size: M3, M4, M5, M6, M8, M10, M12, M14 Features: 1. Round type friction drill (standard type): creates a hole and forms a bushing with a convex ring in one operation, suitable for thread sealing or nut washer applications. 2. Made of tungsten carbide for enhanced durability. 3. Suitable for materials with thickness ranging from 0.5 mm to 12.5 mm, including steel, stainless steel, titanium, aluminum, copper, brass, and aluminum alloys. 4. Compatible with drill presses, milling machines, and CNC machining centers. Package Included: 1 x Hot Melt Short Drill Bit (Round Type)