1. [CNC machining teeth to cutting persuitable formance] All cutting teeth have undergone precision CNC machining, and the machining grooves keep the holes, threads, and taps clean and free of debris and chips.Lubrication is still needed to reduce friction and avoid damaging the tap and mold at all costs. 2. [Practical Application]: This ready-to-use kit is very suitable suitable for cutting and updating external and internal threads according to precise standards., can be processed on hard metals such as alloys, steel, and brass, and can achieve full day persuitable formance in stores or home projects. Product name: 8 pieces die hand set Product use: hand cutting thread Treatment process: finishing Features: , , widely used, and easy to use Type: Tap and Die Set Pieces Suitable suitable for: Hand Screwdrivers and Hand Tools Metric Taps Colour:As Shown Material:Bearing steel Package Contents: 1 set * Die strangler set Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.