A510001 MEGA-SWIVEL CONCRETE ANCHORThe WERNER A510001 10K Mega-Swivel Steel Anchor is a robust anchorage bolt for use in concrete applications. The bolt requires a pre-drilled hole of 3/4 inch and 5 inches depth in 3000 psi concrete with minimum concrete thickness of 7 inches. The D-ring swivel provides a full range of motion at the anchorage.A5100 Series | Anchorage Connectors | Werner US (wernerco.com)https://wernerco.widen.net/view/pdf/gzz9fufwwj/105547-01.pdf?t.download=true&u=sdv0aihttps://wernerco.widen.net/view/pdf/qyeu4j3mxy/GM7696_Werner-FP-Anchorage-Connectors_SS.pdf?t.download=true&u=sdv0ai