8 Pack, A Quick Fix Support System For 4x4 Wood Posts Made Out Of 1/8" Galvanized Hardened Steel, Will Anchor A SaggingPost From The Subterranean Wood Below The Cement & Clamp It Down To The Wood Above, Extends The Life Of Your Wood FenceOr Mailbox For Up To 10 More Years, No Need To Remove Or Dig Up The Old Fence Posts Or Cement, Just Hammer The Post Doctor In, Bolt It Down & Secure With A Thin Layer Of Mortar, Kit Includes: 1 Post Doctor, 1 5/16" Drill Bit, 1 Phillips Head Bit, 1 5" Through Bolt, 2 Washers, 2 Lock Washers & 3 Wood Screws, Tools Needed To Install Hammer, Drill, Crescent Wrench, 7/16Th Socket Head Wrench, 2 1" x 6' Wood Braces & 1 Small Bag Of Mortar.