Application: for broken screws.
Diameter: 1.4-3.6, 2.1-4.9, 3.1-6.5, 4.8-8.8, 6.2-11, 9.4-15 mm.
Thread size: M3-M6, M6-M8, M8-M11, M11-M14, M14-M18, M18-M24.
Drill diameter: 1.8, 2.6, 3.7, 5.5, 7, 10.3 mm.
Number of pieces in the set: 12.