DB Bench Press Form?

Hey guys,
Is it crucial to push it in a triangular shaped way? because I find that it is easier to press it in a straight line or does that relay on the triceps too much? by the way, how do you guys know when you are going deep enough?

–Mond

If your pecs hurt like **** you know you’re doing it right. You are deep enough when the dumbell hit your shoulder/pec. I like to go a litte deaper than that bacause it hit my pecs better.

I always do them with a neutral grip and lower until the DB touch mu chest, then I pause and push it back up. That’s what works the best without fucking my shoulders.