THUNDERHORSEwrote a review of Petzl Laser Speed Light Ice Screws on October 26, 2017
Familiarity: I've used it several times
"These ice screws are, in my opinion, the only ones currently worth bringing on an alpine climb. The weight savings compared to steel screws are very significant, especially in the longer lengths. I chose to carry one 17cm screw, and two 21cm screws. The 17cm screw is to clip myself to while making a v-thread (Abalakow anchor), and the 21cm screw is to make the v-thread. The second 21cm screw is simply in case I drop one; My survival was dependent upon making a ton of rappels (about 40-45), the majority of which were on v-threads, so I needed to be able to efficiently make solid v-threads even if I messed up and dropped one ice screw."