These retractable 2-stroke brackets are made of alloy anodized aluminum to hold auxiliary motors safely out of the water. Stainless guide pin slides in a safety groove for positive, smooth action and locks in 4 different positions. Stainless double torsion springs help offset motor weight for minimum effort. Extra wide 11-1/2" black poly mounting board is 2" thick. Mounting bracket is 5-1/4" W x 9" H.. Max load: 115 lbs. Rating: 7-1/2 -20. Vertical Travel: 11-1/4".