2-in-1 Eraser works on chalkboards and whiteboards. Felt eraser pad is reversible for 2X the use and is excellent at removing chalk and dry-erase ink. Eraser is magnetic to store directly on board surface. Spot-Erase Friendly Form easily reaches corners. Durable molded handle. Board Eraser Application: All Chalk; All Dry Erase; Eraser Pad Material: Felt; Eraser Width: 2in; Eraser Depth: 1.38in.