Erikson Manufacturing - 5,000 lb Toggle Ring Anchor 

Folding rings allow you to quickly and easily add anchor points to your trailer. They can be fixed to the wall or the ground. Their ease of installation makes them a very popular product.

Specifications:

Breaking Strength: 2,264 kg (5,000 lb)
Maximum working load: 7,400 kg (1,665 lb)

Ring Features:

Width: 3.8 cm (at the base, inside)
Height: 3.8 cm (inside)
Thickness: 1 cm (0.375 in)

Base features:

Length: 8.9 cm (3.5 in)
Width: 2.8 cm (1.1 in)
Mounting hole dimensions: 1 cm (0.375 in) square, center distance: 6 cm (2.375 in)
Use grade 5 or higher bolts to secure anchors (not included)
Finish: Bright zinc plated