Search Term:High Speed Steel, Tapping Head, Threaded Drill, M3-M5 M6 M8 M10 M12, Composite Tap, Drill Bit Tap, Features:It is a core drill taps spiral drills taper cutters set.Perfect for cars repair and machinery where metric threads are specified Suitable for soft tapping metal, aluminum, iron.Made of high speed steel,super high precision.High corrosion and wear resistance.Description:The component to be fastened receives a screw through hole and the component to which it is screwed receives a thread.Long life span and super durable.Drill slowly to provide you a perfect effect.It can be using with a electric drill (not included)Specifications:Universal Winder Size:17.5*2.3*0.7cmPackage Size:16*16*4cmMetal case Size:15*11*3.5cmItem Color:silverMaterial:steelThread size - Spiral / core hole drills - TapsM3 - 2.5 mm - M3M four - 3.3 mm - MfourM5 - 4.2 mm - M5M6 - 5.0 mm - M6M8 - 6.8 mm - M7M10 - 8.5 mm - M10M12 - 10.2 mm - M12Package includes:1 x Metal case7 x Core hole drill for M3-M127 x Taps for M3-M121 x Universal Winder Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.