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We adjust the angle of the front part of paint brush, so that when you put the brush on the floor, the floor will not get stained. Furthermore, the handle is hollow, when the paint flow into the handle because of capillarity, the hollow part can store excess paint. No more worries about stains and wasted paint.
CHANG,JIA-YU LIN,LIANG-JUN ZHAN,ZI-LIN HUANG,CHANG-RUEI