ENDURO-FLEX ALU uses a superior zirconia alumina grain blend that is free of iron, sulfur and chlorine and a specially engineered coating to achieve industry leading results when blending aluminum. This discs superior life can also be attributed to the combination of exclusive WALTER technologies, MAX LIFE cold curing glue which eliminates heat from the manufacturing process to provide you with the freshest grains possible and an ECO-TRIM backing which absorbs vibration and can be easily trimmed back to extend disc life. Thanks to its high removal rates, and resistance to glazing, ENDURO-FLEX ALU is the optimal choice for operators looking to enhance both quality and productivity when working with aluminum or other heat sensitive metals. Backing can be trimmed for working in corners. Always use a back flange. Package of 10.