This drill set have 1.0, 2.0, 2.5, 3.0, 3.2, 3.5, 4.0, 4.5, 4.8, 5.0, 5.5, 6.0, 6.5 mm drill bit one piece each.
This bits are very good qualilt and coated also to make it rust roof.
This drill set only for wood, PVC, Plastics, aluminium sheet.
This bits are not suitable for Concrete drills.