Bolster Brackets are heavy duty hot dip galvanizedDesigned to support bolster or bunk boards. Slotted for vertical adjustments and feature non-slip dimples to avoid movement and increase load capacity.Bracket: 10" long x 2.5" WideBolt Hole: 1/2"Slotted Hole:1/2"Bunk Bracket: 3.5" wide with 2.5" on center bolt holes