agility trainers say the same thing. Because the weaves are the hardest for your dog to master, it is essential to have your own set at home. You can't get simpler than this set - just push the spiked poles into the ground in a straight line. The poles are 36" tall. The spikes are made of rigid plastic spikes that grab into the ground, and are removable, if desired, with screws. They work great in soft or semi-hard ground. In addition, because you can position each pole differently, this set is great for training by using the channel weave training method. Included is free colored tape for decorating the poles.