... titanium-plated twist drill bits (19pcs): 1, 1.5, 2, 2.5, 3, 3, 3.2, 3.5, 4, 4, 4.5, 5, ... 5, 5.5, 6, 6.5, 7, 7.5, 8mm 2) Masonry drill bits (6pcs): ... 3, 4, 5, 6, 7, 8mm. 3) Woodworking drill bits (6pcs): 3, 4, 5, 6, 7, 8mm ... 4) Titanium-plated flat wood drill bits (5pcs): 10, 12, ...