schluter kerdi trowel - 1/8in x 1/8 in square notch schluter <p><b>designed for effective installation of ditra products including but not limited to ditra-heat, ditra-heat-tb, ditra and ditra-xl.</b></p> <ul> <li>fast and easy electric radiant installation</li> <li>pro style handle with slip resistant grip is comfortable and strong</li> <li>light weight yet durable</li> </ul>