Could these anchor a tall, heavy metal swing set? Would the 8" type work if set in concrete? Want to avoid losing height by burying legs in concrete.

Kendall, Thank you for your question. This product provides up to 425 lbs of pull force. I cannot say for certain that it would work for this application as I do not know the type of soil or wind trends in your area. This product is designed for securing personal property to the ground in the event of wind or storm so this could be an appropriate use of this product. Best, Customer Care Team