Detailed Product Description Features: 1) HSS titanium-plated twist drill bits (19pcs): 1, 1.5, 2, 2.5, ... drill bits (6pcs): 3, 4, 5, 6, 7, 8mm 4) Titanium-plated flat wood drill bits (5pcs): 10, 12, 16, 20, 22mm ... 5) Titanium-plated hex shank twist drill bits (3pcs): 2, 3, 4mm 6 ...