The Amsterdam 600 series synthetic brushes work exceptionally well with thicker types of paint such as oils and acrylics. The hairs are mounted on the long ergonomic handle with a strong nickel-plated brass ferrule. The flat shape of these brushes makes them ideal for broader, sharp brush strokes and with an assortment of 14 sizes, ranging from 2 mm up to 48 mm, they offer a variety of line weights to choose from.