Material and Design The car suction cups are made of nylon, PC, ABS, PVC and metal hooks. High-strength D-shaped buckle, durable, wear-resistant, and strong bearing capacity; the new professional PVC suction cup adopts new material, ultra-high-strength suction, anti-aging and corrosion-resistant, and can be reused. Suction hooks are ideal if you cant or dont want to drill holes 4 Suction Cup Anchors with 8 S-Hooks The suction cup set is also suitable for heavy duty applications. The maximum load capacity of the suction hook is 22 kg (48 lb). Can be used as a fixed car luggage belt tensioner for outdoor riding, camping, trucking. Package includes: 4 D-shaped suction cups and 8 S-shaped hooks Easy to use Simply press the suction cup on a clean and smooth surface and pull the lever to lock the handle. It wont scratch your car. For outdoor campers, suction hooks are the best solution without screws. Can also be used as a hook in bathrooms, kitchens, etc. For very smooth surfaces, make sure the car surface and suction cup are dry before use. Car suction cups should only be used on glass, car surfaces, mirrors, tiles and other smooth surfaces. Not suitable for uneven surfaces such as patterned tiles. Note: Actual colors may differ slightly from the image due to different monitors and lighting effects.