Wide range of uses: wind cup is suitable for flat lay smooth surface in the automobile, home, office, etc., without damaging the surface; However, any plastic underpad will not stick in case of surface texture; If air can enter, the suction will not hold as it relies on creating a vacuum Set includes: you will receive 4 pieces of suction cups with a secure hook attachment, suction cup of camping is attached with sticky gel base, it has much stronger double suction resistance; its secure hook, for repairing tents, winch to cars, trucks, swimming pools and so on Sucker: this compaction cup can be fixed on more porous smooth surface, it is made of strong materials, with strong strength, long durability and lightweigh. Convenient to use: these suction cups stick to smooth surfaces glass, boats, cars, campers more, just push suction cup on a clean smooth surface, rotate handle to lock securely simply lift lever for release; Before each use, please clean surface with cleaning cloth to ensure better grip Reliable quality: This strong cups underlay is made of quality ABS + ABS + nylon webbing materials, resistant to wear not easy to break, with high adhesion better non-slip effect; It has no glue residue, a strong sticky gel base is added to the suction cup to provide a stronger hold; will be durable in cold or hot environment, until you remove it