The HSS construction ensures these drill bits are suitable for alloyed and non-alloyed steel. Included in this set is two 1.5mm drill bits, two 2mm drill bits, two 2.5mm drill bits, two 3mm drill bits, one 3.2mm drill bit, one 3.5mm drill bit, one 4mm drill bit, one 4.5mm drill bit, one 5mm drill bit, one 5.5mm drill bt, one 6mm drill bit, one 6.5mm drill bit, one 7mm drill bit, one 8mm drill bit, one 10mm drill bit and a split point all in a organised carry case to help keep them organised.
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