Great for hard reach places suitable for interior and exterior use,KINGORIGIN since 1878, we manufacturer and supplied premium class painting tools over 100 years For interior and exterior use use instructions: start in a corner making a letter V about 25″(65cm) with a paint roller fully loaded,just short of dripping. stop go back and fill in the V,smoothing the paint film,refill roller and repeat,working from dry into wet areas.for one coat coverage,apply paint liberally. cleaning instructions:for latex coatings,rinse with warm water and detergent.for solvent thinned coatings follow recommended cleaning instructions provided by coating manufacturer. painting tips: 1.to activate fibers,lightly dampen roller with appropriate medium prior to use(ie:water for latex paint thinner for oil base paints). 2.load roller thoroughly but don’t overload. to clean: 1.for waterbased paints:clean cover in water 2.for oil based paints:clean cover with solvent recommended by paint manufacturer. 3.never leave cover soaking in paint solvent.