safety latch, hook & eye with spring, zinc, 2 inch [1860-10fba] eye distance can vary from 2.1/4" to 2.1/2" 10 pack aldaba o gancho para puerta mi madol imports, llc madol the safety hooks are measured 2" from the hole centers. eye distance can vary from 2.1/4" to 2.1/2" . safety hook and eyes are great for light duty closures and for wood applications. they are often used in the yard to close a light gate or shed, or as a safety for children. spring loaded latch secures items. the hook comes with two eyes and are easy to install.