Rennie Tool Co Ltd. M35 alloyed HSS steel with 5% Cobalt content. Includes 1 of each of the following sizes - 1mm 1.5mm 2mm 2.5mm 3mm 3.5mm 4mm 4.5mm 5mm 5.5mm 6mm 6.5mm 7mm 7.5mm 8mm 8.5mm 9mm 9.5mm 10mm 10.5mm 11mm 11.5mm 12mm 12.5mm 13mm.
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