The Mammut Carbon Pro Probe 280 Speed Lock uses an individually lockable tensioning system built for fast, reliable assembly, with an audible click confirming a full, correct lock on extension. High-quality carbon construction keeps the probe rigid yet lightweight, built for a single purpose and nothing else. What Our Gearhead(R) Experts Are Saying:"I've run this through enough companion-rescue drills to trust the click without looking down at it. It locks the same way every time, cold hands and gloves included, which is exactly what I want from a probe I'm not thinking twice about in the moment."