Reaffirm the climber you're belaying that Edelrid's HMS Strike Slider Locking Carabiner actually locks before said sender throws a fit in the middle of the gym. Show your climber the small sliding lock on the front of this superlight carabiner's gate, and while you're at it, show off the carabiner's snag-free keylock nose and weight-savings H-profile construction. You'll be catching your confident climber in no time.