· High Quality M35 Alloyed HSS steel with 5% Cobalt Content. Cobalt Drill Bits. 10X Cobalt Drill Bits. 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.3mm, 3.5mm, 4mm, 4.1mm, 4.2mm, 4.5mm 5mm, 5.5mm, 6mm, 6.5mm, 6.8mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm & 13mm.
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