<https://www.vanjak.com/product/10mm-eye-bolt/#product>
<http://schema.org/description>
"This eye bolt is used for attaching guy wires to a masonary wall.\r\n.\r\nIt has a 10mm thread and requires a 16mm hole to be drilled a minimum of 60mm deep in the masonary.\r\n\r\nIt is suitable for attaching guy / catenary wires etc to brickwork and masonary.\r\n\r\nIt is advisable to drill the hole at least 10mm deeper than the bolt is long."
<https://www.vanjak.com/product/10mm-eye-bolt/>