Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon RockLock Magnetron by Black Diamond $29.95 Availability: translation missing: en.general.icons.icon_check_circle icon 11 in stock, ready to be shipped 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Looking for Local Pick-up? Choose a store below. Product Locator by Locally Notify me when back in stock Email address Email me when available Our large, versatile locking biner featuring Magnetron Technology, which uses magnets in the gate and a steel insert in the nose for unprecedented security and ease of use.