Full review

Black Diamond ATC-XP Belay Device on the rock

The Black Diamond ATC-XP belay device is a tube-style belay tool designed for climbers who need a versatile piece of hardware that performs reliably across a wide range of rope diameters and climbing disciplines. Machined from a single piece of lightweight aluminum, the ATC-XP features two distinct wide and narrow slots, giving climbers the option to belay with higher friction for skinnier ropes or reduced friction for fatter, single-rope setups. This dual-slot design makes it a favorite among climbers who use different ropes for sport climbing, trad routes, and multi-pitch objectives, since a single device can handle diameters from roughly 7.7mm up through 11mm without needing to swap tools between outings.

Beyond straightforward belaying, the ATC-XP is built to accommodate rappelling with a single or double rope strand, making it a dependable companion on long alpine descents or standard sport crag rappels alike. The device includes raised ridges on the friction-increasing side, known as high-friction teeth, which grip the rope more aggressively during rappels or when catching a fall, giving the belayer more control without excessive strain on the brake hand. Climbers who frequently transition between single and double-rope rappels appreciate that the ATC-XP doesn't require a completely different device, keeping their rack simpler and their gear loops less cluttered.

Durability is another hallmark of the ATC-XP, as the anodized aluminum construction resists the wear and grooving that can develop from repeated rope friction over time, extending the working life of the device even under heavy gym or crag use. Its stainless steel wire keeper loop keeps the device oriented properly on a locking carabiner, reducing the chance of cross-loading or flipping during setup, which is especially useful when belaying in the vertical, high-stakes environment of rock climbing. Compact and light enough to disappear on a harness gear loop, the ATC-XP remains a trusted, no-frills belay device for climbers who value simplicity, control, and multi-rope compatibility in a single, well-machined tool.

Where it sits in the Belay & Hardware field

Against the other 19 belay & hardware pieces on the bench, this one lands at #58 overall with a bench score of 82. Its strongest axis is value; its weakest is comfort, which is where the closest alternatives listed alongside make up ground.