The Schluter DITRA Trowel (TRL-DIT) with an 11/64" x 11/64" (4.5 mm x 4.5 mm) square notch is designed specifically for installing Schluter DITRA and DITRA-HEAT membranes. Its precision-engineered notch size ensures optimal adhesive coverage, improving bonding and performance. This high-quality trowel offers durable construction and ergonomic design, making it a reliable tool for professional tile installers. Ideal for both residential and commercial projects, the DITRA Trowel helps achieve a consistent, smooth application every time. Schluter Trowels are made of uncoated stainless steel, making them more durable.