Cobalt drill bit set, 99pce set in steel box, these drill bits are very good quality ideal for the engineer. You must use a cutting oil when using these drill bits in metals. Sizes: 3mm 10pc | 3.2mm 10pc | 3.5mm 8pc 4mm 8pc | 4.5mm 3pc | 5mm 3pc | 5.5mm 2pc 6mm 2pc | 6.5mm 2pc | 8mm 2pc | 10mm 2pc
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