The drill goes as follows:
Level 0: OP Clipper > OP Clipper
Level 1: Level 0 > SS Clipper > OP Clipper > SS Clipper > OP Clipper
Level 2: Level 1 > 2x SS Clipper > OP Clipper > 2x SS Clipper > OP Clipper
Level N: Level N-1 > Nx SS Clipper > OP Clipper > Nx SS Clipper > OP Clipper
What is the highest level you can get to? I'd say reaching level 10 means your clipper game is decent. Anyone who considers themselves a good clipper player should be able to reach level 15 or so, although I haven't reached those levels so that's just an assumption.
The number of contacts in Level N, denoted C(N) can be calculated as follows
C(N) = C(N-1) + 2N + 2
Here's the number of contacts for the first 15 levels
Level 0: 2 contacts
Level 1: 6 contacts
Level 2: 12 contacts
Level 3: 20 contacts
Level 4: 30 contacts
Level 5: 42 contacts
Level 6: 56 contacts
Level 7: 72 contacts
Level 8: 90 contacts
Level 9: 110 contacts
Level 10: 132 contacts
Level 11: 156 contacts
Level 12: 182 contacts
Level 13: 210 contacts
Level 14: 240 contacts
Level 15: 272 contacts
Level 20: 462 contacts
FAQ
Why is it called Triforce Drill? I have no fucking clue, ask Derek