The PoolPup Steps works with both in-ground and above ground pools ? and will not damage your vinyl liners.its a convenient way for your swimming dog to get out of the water,easily and an excellent safety device while ypu areaway from the pool. PoolPup Steps are a convenient way for your swimming dog to get out of the water,and an excellent safety device while ypu areaway from the pool.Features: The discreet step provides a secure, long-lasting escape for dogs. The PoolPup isMade from strong UV stable, chlorine-resistant ABS plastic. Contains no holes that paws can get stuck in. Steps have slip-proof grIt istrips to ensure solid footing for your dog. Once installed,its very easy to remove and replace, just take out the 2 pins and lift the PoolPup off the deck for pool cleaning or winter storage.Installation: Use a drill to bore two small holes in the pool deck. The drill bit is even included with the step. Once installed, the dog is trained to know the step?s location and then has the ability to save itself. Training takes just a few minutes and instructions are included.