Steel slip Schwan 400 mm

Steel trowel/steel blade, which is especially good for spreading wall and floor compounds.

Steel trowels/smoothing blades are meant for spreading compounds evenly over a large area. They're available in several different sizes. With larger blades, you can spread bigger amounts of compound faster, but the bigger the blade, the heavier the spreading work gets.

Compounds are spread on the surface by pulling or pushing the blade against it. This way, the uneven spots on the surface get filled evenly.