10x PCB CNC drill Bits 0.3mm to 1.2mm. Material: Hard alloy (tungsten steel). ① bit chip space is large: small chip resistance, chip and smooth, heat a small drill, drill reduce pollution;. ② extraordinary cutting edge sharpness: As a result of nanotechnology and advanced grinding technology, bit more sharp cutting edge than before, can reduce the cutting force, reduce the broken drill rate, improve the hole wall quality;.
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