DMM x Treeworker Ultra O Locksafe 3 Way Carabiner - Black / Green

DMM x Treeworker Ultra O Locksafe 3 Way Carabiner - Black / Green

The same DMM hook we all know and love but with a Treeworker twist!

The DMM Ultra O Locksafe 3 Way Carabiner in Black & Green is a lightweight and high-strength connector designed for climbing, rigging and technical rope work. Its symmetrical oval shape supports balanced load distribution, making it ideal for use with pulleys, swivels and mechanical devices. Built for professional environments, it delivers reliable performance while maintaining efficient handling in complex systems.

Symmetrical Oval Design for Balanced Loading

The Ultra O features a true oval shape that keeps connected equipment centred within the carabiner. This improves alignment and helps reduce the risk of cross-loading, supporting smoother operation when used with pulleys, swivels and hitch systems. The design makes it particularly suitable for applications where stable positioning is essential.

Secure Locksafe 3 Way Gate System

The triple-action Locksafe mechanism requires three deliberate movements to open, providing enhanced security during use. The lift, twist and pull action helps prevent accidental gate opening while still allowing controlled and efficient handling. This makes it well suited to demanding arborist, rope access and rescue environments.

Lightweight Strength with Durable Finish

Constructed from aluminium, the Ultra O offers a strong yet lightweight solution for everyday use. With a major axis strength of 25 kN, it provides dependable performance in high-load situations. The anodised finish improves resistance to wear and corrosion, supporting long-term durability in challenging conditions.

Key Features

• Symmetrical oval design for balanced load distribution
• Keeps pulleys and devices aligned within the basket
• 3 way Locksafe gate for enhanced security
• Requires lift, twist and pull action to open
• Aluminium construction for strength and reduced weight
• Major axis strength of 25 kN
• Wide gate opening for easy attachment
• Anodised finish for durability and corrosion resistance
• Compatible with pulleys, swivels and climbing systems
• Certified to EN 12275:2013 B and UIAA121:2009
• Special edition collaboration between DMM & Treeworker