PETZL NEOX Belay Device with Cam-Assisted Blocking — Optimized for Lead Climbing, Black

Lead climbing, gym and crag-ready belay device

Meet the PETZL NEOX, an assisted blocking belay device crafted for modern lead climbing in both indoor gyms and outdoor crags. With an integrated wheel that smoothly pays out slack and a responsive cam system, NEOX helps you manage belay transitions with greater precision and control. The ergonomic handle supports comfortable descent, while compatibility with standard single ropes from 8.5 to 11 mm makes it a versatile choice for a wide range of climbs.

How it works: The stainless steel wheel turns freely when you pay out or take slack, then halts and activates the cam when the rope is weighted. This combination can help you maintain steady slack management during dynamic movements and belay station changes. In addition, the internal cam pivots to clamp the rope as you catch a fall, providing a reliable blocking action regardless of brake- strand angles, thanks to a spring-loaded mechanism. Lowering is smooth and controlled thanks to a 3:1 mechanical advantage and an easy-to-grip handle, which together make controlled descents more predictable for both belayer and climber.

Two clear benefits at a glance

• GIVE SLACK EFFICIENTLY: The built-in wheel supports quick slack payout while preserving control, reducing the effort of long pulls between moves.
• REDUCE BRAKE-HAND FATIGUE: A weighted rope triggers the cam to block, supporting you during falls and helping sustain belay endurance over longer sessions.

Designed for rope compatibility and everyday use: NEOX works with single ropes from 8.5 to 11 mm, making it suitable for gym drills and outdoor sport routes alike. The ergonomic handle enables a confident lowering experience, and the device’s compact form helps with transport between crag and gym. While not a guarantee, the combination of smooth slack control, secure blocking, and progressive descent can translate into a more relaxed belay during busy climbing days.

What you might notice in practice: Belayers who prioritize rhythm and flow during lead climbs may appreciate the way NEOX supports continuous slack management, crisp rope catching, and a comfortable lowering motion. The device’s simple compatibility and intuitive controls align with common gym setups and outdoor belays, offering a capable option for climbers seeking reliable assistance without sacrificing control.