Diamond Coated Twist Drill Bits - 0.8mm 1mm 1.2mm 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm Specification: Type: Diamond Coated Twist Drill Bits Material: Diamond + High Speed Steel Drill Diameter: 0.8mm 1mm 1.2mm 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm Overall length: 50mm Scope of use: Jade, metal, agate, jadeite, gemstones, pearls, pendants, and pebbles can all be used (the effect varies depending on the material hardness)
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