I purchased two 90kg gliders for some heavy concrete pots. Parcel arrived and I thought something was amiss because it was very light. It’s amazing how these gliders work and carry the load on such a lightweight piece of equipment. Even more surprised when my pots were loaded onto them and they just glide wherever you desire. Truly fabulous design. Congratulations. So very happy to recommend them to my nephew. He was also amazed when he moved the pots with the greatest of ease. He will b placing an order very soon.