I just did the brakes on my MK6 Golf R, so I needed the M-14 triple square bit to remove the caliper carrier... I also have done my girlfriend's Jetta, which also requires that bit.
This second time, I was totally prepared. On the Jetta... not so much. So I decided to post this video of the triple squares I bought.
They worked excellently on the Golf! Much better than the two bits I destroyed doing the Jetta.
Hope this helps and happy DIYing.