DMM Ultra O Durolock 4 Way Carabiner - Titanium

DMM Ultra O Durolock 4 Way Carabiner - Titanium

The DMM Ultra O Durolock Carabiner is a symmetrical oval connector developed for stable, predictable loading in professional rope systems. Finished in Titanium and Purple, it is designed for arborists and rope access users who rely on consistent device alignment when working with assisted braking devices, pulleys, swivels, and shackles. The balanced Ultra O geometry supports calm system behaviour, allowing attachments to settle naturally under load with minimal movement.

Symmetrical oval shape for stable loading

The oval profile features symmetrical rope baskets that enable connected components to self-centre when weighted. This helps maintain stable loading characteristics and reduces sudden shifts within the system. The round basket shape also avoids the abrupt clicking often associated with D-shaped connectors, contributing to smoother and more predictable performance in both tree care and rope access applications.

Versatile use across rope access and rescue systems

Oval connectors are widely used where multiple connectors, slings, ropes, or pulleys must share a single connection point. The Ultra O sits comfortably either way round, so rotation within systems is not required. This makes it equally suitable for fall arrest situations, pre-rigged rescue systems, and everyday climbing or rigging tasks where clean alignment and balanced loading are important.

Secure Durolock gate with snag free connections

The clean nose gate uses DMM’s patented Taperlock closing mechanism, employing a flared profile to increase gate push-in and cross gate strength while maintaining snag free connections with ropes, slings, and devices. The Durolock auto-locking gate requires four distinct operations to open, with force needing to be maintained throughout. If released, the gate returns to a safe locked position. With 25 kN major axis strength, 12 kN minor axis strength, and 7 kN gate open strength, the Ultra O Durolock delivers dependable performance in demanding working environments.

Key Features

• Symmetrical oval shape for stable and self-centring loading
• Suitable for assisted braking devices, pulleys, swivels, and shackles
• 25 kN major axis, 12 kN minor axis, and 7 kN gate open strengths
• Durolock auto-locking gate with four action opening
• Taperlock clean nose design for snag free connections
• 20 mm gate opening for controlled device attachment
• 84 g weight with dimensions of 63 x 109 mm
• Certified to EN362 B and EN12275 X/B standards