It's hard to say without seeing it. These are plastic molded.
Lag Screws should suffice for your application.
It attaches with 4 3/8" bolts. I used 1 1/2" long stainless steel.
Hi Rob, The floating dock bracket you are referencing has been redesigned. The new item will be available in about 2 weeks and is designed to guide a floating dock structure and support it along with the pipe.
Availability will be approximately 3 weeks.
Hi Chad, per our vendor, this 6 in. x 6 in. x 5 in. Post Style Floating Dock Brackets has an estimated arrival for online stocking of 12/31/2017 which is subject to change. If you would like to be notified with updates on the status of this item, you can enter your email address into the field provided on the product's page. We appreciate your business and look forward to serving you in the future. Thank you for shopping Home Depot!
"For use with dock post pipe up to 2” on diameter." Statement is from the Tommy Dock website.