Manufactured from rust resistant aluminum construction, corrosion-resistant and durable. Surface spray powder coating which can protect the adapter from sun and rain. No drilling, No dismantling, right into existing mounting holes. If you have any questions, please write to our customer service, we will provide you with pre-sales and after-sales services within 24h.Placement on Vehicle: Rear, External. Crossbar Measure: 66-1/2" x 3-1/2" x 1-3/4. Height: 28-1/2 not including the height of your truck's bed. Max Weight Capacity: 1,000 lbs. 2 x Universal Truck Ladder Rack. Efficient, applicable, safe and durable. Please do not open the case at will, or apply for a return. We assure you that we will definitely solve the problems you are currently experiencing. Thank you for your support and understanding.