Step down drill-bit Ø5,2 - Ø3,8 - for Ø9
Step down drill-bit Ø6,7 - Ø5,3 - for Ø13, M8, 320 Ø15
Step down drill-bit Ø7,2 - Ø5,8 - for Ø14, 320 Ø16
Step down drill-bit Ø7,7 - Ø6,3 - for Ø16
Step down drill-bit - for Ø18, Ø20