A diamond drill bit is recommended.
A few times it worked really well and I was able to get a sort of preview of what vaulting on a bigger pole was like, but we ended up stopping after I had a couple of jumps that were a bit wilder than I was comfortable with.
Diamond bits are traditional for glass drilling; they will drill many holes with one bit and rarely cause breakage if properly used.
Rebollar, a drill instructor with Company D, 1st Recruit Training Battalion, Recruit Training Regiment, corrects a recruit aboard Marine Corps Recruit Depot San Diego, Calif.
I am not improving as fast as others but the other coach did say I have a good foundation.
Understanding the tool limitations and how the bits work is the best place to start, at the end of this lesson you'll be a pro in drilling.