HSS Twist Drill Bit 0.3mm-3mm Drilling Iron Sheet, Aluminum, Wooden, Plastic. 【Material】: HSS 4341. 【Size】:0.3mm, 0.5mm, 0.7mm, 0.8mm, 1.3mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.3mm, 2.5mm, 2.6mm, 2.8mm, 3mm.
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