1. use with 1,500 lb. thru 2,500 lb. hand winches 2. Gauge size is 0.394". 3. OEM brackets OEM brackets Heavy Duty Angle-Mounting Winch BracketFor use in securing hand operated winches to a building.• For use with 1,500 lb. thru 2,500 lb. hand winches.• 5-1/2" x 5-1/2" x 10" with 0.54" diameter holes.• Gauge size is 0.394". OEM brackets