5/7PCS Set HSS Machine Spiral Point Straight Fluted Screw Thread Metric Plug Hand Tap Drill 3-12MM Tapping Screw Tap

[Product Name]: HSS Machine Hand Screw Thread Metric Plug Tap Drill Bits [Description]: Size: 5Pcs: 3mm 4mm 5mm 6mm 8mm 7Pcs: 3mm 4mm 5mm 6mm 8mm 10mm 12mm Material; 45 steel processing (Steel mould; Bearing Steel) Ldeal for auto repair and machinery where metric threads are specified. Suitable for operating on low-hardness workpieces such as wood, plastic and aluminum. [Method of use]: 1. When tapping, the center of the tap is inserted into the center line. 2. Rotate the two hands evenly and add a little pressure to the tap, so you don't have to add pressure. 3. Each roll tap a reverse about 45 ° to cut chip, so as to avoid blocking. 4. Do not add rotational force if the tap is difficult, otherwise the tap will break.