This is a manual system to easily mix concrete, mortar, sand, soil, grout, etc. Been used maybe three times. Very happy with the results! Baffles mix material thoroughly by rolling the Odjob around. Add water and dry ingredients, seal the lid, and roll the barrel on its side to mix. Mix quantities from 10 kg/20 lb to 30 kg/60 lb. Approximately 18"H x 12 ½ "W.