Petzl's Sm'D Wall Carabiner clips more than bolts, slings, and gear. Its unique, discrete hole connects to Petzl's Tibloc and similar, smaller accessories so you don't lose them on big walls, multi-pitches, and alpine routes. That doesn't mean that the Sm'D only thrives with the alpinists and big wall climbers though. Its I-profile assures a phenomenal weight-to-strength ratio for sport climbers, and the H cross-section on the gate adds ergonomics for clip-and-go convenience.