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20 Piece 0.3,1.6 mm Diamond Micro HSS Twist Drill Bit Set Precision Craft And Hobby WorkDiamond Micro HSS Twist Drill Bit Set is ideal for precision craft and hobby work, electronics, jewelry and more! Diamond micro HSS twist drill bit set Piece 20 piece set High speed steel drill bits Includes sizes: 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1.0, 1.2, 1.3, 1.4, 1.5 and 1.6 mm