The Forney 61312 Die Cast Hook And Eye Turnbuckles have a multi-purpose forged steel body. Observe all maximum working load limits. Overhead lifting or support of human weight requires special chain and accessories. Forney Industries is one of America's longest operating family-owned metal working product companies. Founded in 1932, Forney offers more than 5,000 products for the hardware, automotive, farm and ranch and do-it-yourself markets. If you've got metal working questions, we've got answers. We're committed to your success regardless of location size or needs. 5/16-Inch (7.95mm) hook and eye turnbuckle bolt diameter. Bracket Length: 3 11/16-Inch (17.46mm). Max Work Load: 700-Pound (317.51 Kg). Claims for warranty must be made within 90 days of the date of purchase. Proof of purchase required. This warranty does not cover any product that has been subject to misuse, neglect, negligence or accident, or that has been used in any way contrary to the purpose intended.