3 pcs step drill bits (one 5-Step Drill Bit from 4mm to 12mm, one 9-Step Drill Bit from 4mm to 20mm and one 15-Step Drill Bit from 4mm to 32mm). 6Pcs Drill Bit Set Sharp & Wear-Resistant: These drill bits are made of high speed steel with titanium coating for proven capability and durability.
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