9-inch paint roller,

1. Large-area rapid painting: smooth large surfaces such as walls, ceilings, and floors, with an efficiency far higher than that of brush painting.

2. More uniform coating: It is less likely to leave obvious brush marks, and the paint surface is smoother and finer.

3. Savings in paint: uniform material absorption reduces waste and speeds up construction.

4. Suitable for latex paint: latex paint is most commonly used for wall coating in home decoration.

5. Create a texture effect: different length rollers can create fine lines, brushing, etc. wall surface texture.

Simple rule: use a roller for large surfaces, and a brush for corners and details. Both are usually used together.