This artist easel is the best of both worlds. I designed it for my son. I took the best studio easel and the best portable easel an came up with this piece. It completely folds up and fits in the back seat of your car, or you can leave it up in the studio. The mast will raise to almost 4 feet tall by removing the bottom lock down if you need it to. The 5" tray has 3 brush holes on the left hand side and a 2 7/8" cup hole on the right for thinner or water (coffee!!) that can be removed. The knobs are solid wood. Easy to set up and will adjust to fairly uneven turrain.