<b>This Inflatable Boat Launching Wheels are Good for Saltwater using.</b><br> Suitable for：<br> ● Inflatable boats<br> ● Aluminum boats<br> ● Fiberglass boats……<br><br> <b>About Design:</b><br> - Constructed of heavy-duty marine grade anodized stainless steel. <br> - Enable one man launching of inflatable boat . <br> - Wheels Swivel Up and Down with stainless steel Marine Quick Release Pins when needed .<br><br> - Shorter Transom Bracket can give more possibility of installation for all type of boats with different transom. <br> - User can Install the Brackets at Water Line Top Position, so the water Won't Hit the Screw Holes. <br><br> - Two Bottom Collinear Bolts give the bracket Extra Strength and Stabilizes. <br><br> <b>Triple Heavy Duty, Triple Quality! </b><br> <b>The Quick Operation Features of Deluxe Boat Dolly include：</b><br> ● Spring Load Locking Pin for Wheel Arm Position Adjustment；<br> ● Solid Spring Load Buttons for Wheel Arm Length Adjustment；<br> ● Quick Released Lock Pin for Wheel Arm and Wheel Bearing.