Use 1 pair for 4x4 or 6x6 posts, and 4 units for 8x8 posts Thickness: 12 Gauge Prepunched hole diameter(2 kinds): For 3/8" bolt, For 1/4" screw Low Carbon steel, hot dip galvanized Used for braced carports, patio covers,mailboxes,fence,decks and other 4x4,6x6,8x8 wood structures Package Content: 8 pcs post base guards bracket Specification: Material:Carbon steel Q235B Finish : hot dip galvanized Size:2-1/2 x 2-1/2x 5-1/8 inches (63.5 x 63.5 x 130mm) Thickness:2.5 mm(12 Gauge) Hole diameter (2 types): φ11mm (2 pcs) for 1/4" masonry screws;φ7mm (8 pcs) for 3/8" screws. Weight: 335g-1 pack Package content: Package content: 8 pack post base guards bracket(Screws Not Included)