High-Quality Materials:✔Use SUS 304 stainless steel,more solid quality,corrosion resistance.Without any appreciable stretching or ill effects to the finish from weathering.✔Four screws are also SUS 304 stainless steel.Convenience Installation:✔This comes with two 5/16″ pre-drilled holes for bolting installation to wooden beams,cedar wood, rafters or concrete.✔Screws/bolts is included,2 concrete anchor and 2 hex lag bolts.✔One type of design,no complicated assembly,easy …