The United Abrasives/SAIT Type 27 Z-Tech™ Pipeline wheels are made to go on an angle grinder. The SAIT Z-Tech™ Pipeline wheel is a high performance wheel for cutting and light grinding on the toughest applications. The Z-Tech™ is composed of tough zirconium grain. United Abrasives/SAIT wheels are reinforced with the highest quality fiberglass for maximum safety and performance. Proudly manufactured in the USA.