ITEM NAME:8pcs Thread Metric Machine Wrench Hand Screw Thread Plug Taps Set M3 M4 M5 Y2F8 8pcs Thread Metric Machine Wrench Hand Screw Thread Plug Taps Set M3 M4 M5 Y2F8 All steel design, surface treatment, durability of the highest. Color: silver. Material: Bearing steel, suitable for plastics and soft metals, such as aluminum, iron. Easily switch from left hand to right hand operation, or lock non-ratchet use. Instructions: When tapping, insert the cone to the tap center line and the drilling center line. Hands rotate evenly and put a little pressure so that the tap goes into the knife, no need to increase the force after the pressure. Turn 45 degree to cut off the chip, so as not to block. If the tap is difficult to rotate, you can't increase the rotational force, otherwise the tap will break. Item name: tap / wrench Specifications: M3x0.5, M4x0.7, M5x0.8, M6x1.0, M8x1.25, M10x1.5, M12x1.75 Weight: 250g Package included: 7 x Screw taps 1 x Die holder Only the above package content, other products are not included. Note: Light shooting 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..If the tap is difficult to rotate, you can't increase the rotational force, otherwise the tap will break. Hands rotate evenly and put a little pressure so that the tap goes into the knife, no need to increase the force after the pressure.