Product name: four manual punch (hand twist drill) Specification: about 93mm (length) about 9mm (diameter) 2 clips with 4 specifications for 0.8-3.0mm diameter tool. It can be used for repair. The play is suitable for drilling holes in materials such as the golden steel olive nut plastic and so on. Note: this twist drill is not suitable for the drilling of hard materials such as agate jade, metal and steel, which can lead to unusable condition. Wear protective tools or attention to emergencies when used. Please keep the direction of the force vertical, and rotate evenly, or it will be easy to break.