0.8-2.5mm Diamond Coated Tipped Twist Drill Bit for Glass Jewelry Stone Ceramics

2 pcs 2.5mm tipped twist drill bits. 5 pcs 2.5mm tipped twist drill bits. 10 pcs 2.5mm tipped twist drill bits. Suitable for jewelry,ceramics,glass and semiconductor material. 2 pcs 2.0mm tipped twist drill bits.

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