General description The 13pcs 1/4inch High Speed Steel Drilling Bits Kit includes a variety of drill bits ranging from 1.5mm to 6.5mm, designed for efficient drilling in wood, plastic, iron, steel, copper, and aluminum. The bits feature a hex shank for quick installation into various types of drills, ensuring versatility and ease of use. Technical specifications Number of pieces: 13 Shank type: Hex Bit sizes: 1.5mm to 6.5mm Material: High speed steel Features: High hardness, wear resistant Usage Suitable for drilling into wood, plastic, iron, steel, copper, and aluminum. Designed for use with power drills, impact drills, and bench drills.