Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon GridLock Magnetron by Black Diamond $39.95 Availability: translation missing: en.general.icons.icon_check_circle icon Only 1 left! 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 innovative belay biner featuring Magnetron Technology, which uses magnets in the gate and a steel insert in the nose for unprecedented security and ease of use.