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25 pieces twist drill set, HSS steel, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13 mm.
Reference: HT614173
Brand: Harden Tools
3 pieces step drill bit set, HSS steel, imperial version. 3/16-1/2 inch, 1/4-3/4 inch, 1/8-1/2 inch.
Reference: HT614143
Brand: Harden Tools
3 pieces step drill bit set, HSS steel, metric version. 4-12 mm, 4-20 mm, 4-32 mm.
25 pieces twist drill set, HSS steel, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13 mm.