J-Hooks are used to anchor the home in concrete. They must be installed prior to the concrete being cured.
J-Hook Anchor Installation Instructions:
1.) The J-Hook needs to be hooked around rebar or an equivalent either before concrete is poured or inserted and hooked while concrete is still wet.
2.) The J-Hook anchor head should sit flush with the top of the concrete with no exposer of the hook shaft while still allowing the anchor head to swivel.