Features: Package Includes: 3in1 6pcs drill tap bits, M3x0.5 M4x0.7 M5x0.8 M6x1 M8x1.25 M10x1.5. Durable Material: HSS4341 (high-speed steel) for capability and durability. Firmly Connected: Drill and tap bits have a high-quality hex shank to confirm a strong connection to the drill chuck. Ideal for: Hole drilling, tapping, and deburring/countersinking applications in wood, copper, brass, etc. Warranty: If there are any problems, please contact our store in time. We will give you a satisfactory solution.