ITEM NAME:7Pcs Spiral Hand Thread Tap Screw Spiral Point Thread Metric Plug Drill Bit N8W8 7Pcs Spiral Hand Thread Tap Screw Spiral Point Thread Metric Plug Drill Bit N8W8 Made of high speed steel material, durable to use;Spiral screw is suitable for cutting high toughness material;Easy to drill the bottom;7 different sizes to meet your different needs; Spiral tap is one of the thread processing tool.Spiral groove taps chip performance is excellent, tapping smooth. All of them are standard coarse taps. Package weight: 0.151 kg Package Size(L x W x H): 11.00 x 7.00 x 1.00 cm / 4.33 x 2.76 x 0.39 inch Colour: Black Material: high speed steel 6542 Specifications:M3 diameter: 0.5mm M4 diameter: 0.7mm M5 diameter: 0.8mm M6 diameter: 1.0mm M8 diameter: 1.25mm M10 diameter: 1.5mm M12 diameter: 1.75mm Package Contents: 7* Spiral Hand Thread Tap