painting interior corners with a sponge

[abc]

was watching one of those cable shows about fixing homes, they brought out a square sponge i couldnt get the name but he was saying how great it was.. he was painting the area where the drywall connects to the ceiling... the sponge had these wheels or knobers in it too.... anyone know what this is?

 

[ElFenix]

i've seen those all over the place...

 

[TwinkleToes77]

an edger? I buy those all the time for painting.. the only thing that sucks if you get paint on the wheels then you get paint on the wall you are edging around.

 

[Fiveohhh]

If you have a sprayed ceiling you'll make a mess with those. A brush and 1 gallon can is still best IMO.