DMM Ultra O Locksafe Orange 3-Stage Auto-Locking Carabiner | Rope Access & Rescue

Overview

The DMM Ultra O Locksafe Orange 3-Stage Auto-Locking Carabiner combines a balanced oval basket with a secure auto-locking gate. The vivid orange finish enhances visibility in busy rope-access environments and tree work, helping crews quickly identify connections and keep gear organized as conditions change.

Designed for versatile setups, the symmetrical basket centers attachments under load, promoting stable handling whether the carabiner sits upright or inverted. This makes it well suited for teams using multiple connectors, slings, ropes, or pulleys in rapid rigging and rescue scenarios.

Smart design for snag-free connections

The patented Taperlock nose increases gate push-in strength and cross-gate strength with a flared profile, while enabling snag-free connections for ropes, slings, and devices. This thoughtful engineering helps you connect essentials smoothly, reducing fuss during complex assemblies.

The Locksafe gate requires three distinct actions to open, delivering an extra layer of security in dynamic environments where quick, deliberate access is important.

Key specifications at a glance

• Dimensions: 63 x 109 mm
• Weight: 74 g
• MBS (major axis): 25 kN
• MBS (minor axis): 12 kN
• Gate opening: 19 mm
• Certifications: EN362:2004 B, EN12275:2013 X/B, UIAA121:2009

Real-world uses

In rope access and tree care, the oval basket design helps multiple connections sit neatly, so you can attach slings, ropes, or pulleys without constant reorientation. It also suits fall-arrest setups and pre-rigged rescue configurations where predictable centering and stable loading matter, even under dynamic movement.

Offered with a high-visibility orange finish, it’s easier to spot among gear bags and harnesses, which can save time on busy job sites. The combination of a secure three-action gate and a robust load path supports a range of professional applications without sacrificing ease of use.

Practical benefits at a glance

• Self-centering loads improve handling in complex systems
• Symmetrical oval basket reduces the need to rotate the carabiner
• Three-action auto-lock gate enhances security in active settings
• Snag-free nose designed for smoother connections with ropes and devices