Self-operating mixer for processing heavy, plastic pre-mixed materials. Easy to operate and clean, compact in size, and intensive and powerful when mixing thanks to the 3-arm mixing tool. Simple material filling due to the tear strip; discharge into a mortar bucket or wheelbarrow via a bottom slide; safety switch and automatic shut-off. Equipped with a hose connector for dust extraction. Suitable for plaster and masonry mortars, cement screeds, gravel concrete (up to 16 mm); epoxy resin screeds; grouting and drainage mortars, monolithic concrete.