DP5420BC, Zinc, Single, Round, Rail Bracket, Designed To Be Used With #5400 Round, Rail To Mount Rail To Side Of Building, Offset Nail Holes For Quick Placement, Compatible With 5438 & 5439 Snap On Flashing Brackets, Embossed Steel Is For Added Strength, 1 Bracket Should Be Installed Every 2' Of Rail, Includes Lag Bolt.