Now Available! Schluter trowels are specifically designed for use with Schluter-DITRA and KERDI membranes and are labeled accordingly. The square-notch design ensures that the amount of adhesive dispersed is consistent. The exclusive RUBIFLEX handle provides a comfortable grip even on big tiling projects while the hardened steel plate ensures longevity and durability. DITRA trowel is: 11/64” x 11/64” (4.5 mm x 4.5 mm) KERDI trowel is: 1/8” x 1/8” (3 mm x 3 mm) For more information please contact our Customer Support Representatives at 1-800-472-4588.