The Foundation Piecing Water Pen makes it easy to remove the papers from your Foundation Paper Piecing. Simply Fill the Foundation Paper Piecing Water Pen's refillable reservoir with water, then run the brush tip along your seam lines. Allow the water to penetrate the paper, loosening the paper fibers, and then easily tear off your papers. The tip releases only a small amount of water along the seam line, which keeps the pen from soaking your fabric with water. It also keeps the water right where you need it - right at the seam line. Each package comes with two Foundation Paper Piecing Water Pens. Pens can be refilled with water over and over for repeated use. Also works great for removing triangle paper when piecing half square triangles.