Use the LU89M series blades for cutting nonferrous metal such as copper pipe, aluminum extrusions, brass plate, etc. These blades have custom designed gullets to minimize chip build-up and specially formulated MicroGrain carbide tips and Tri-Metal brazing for long life and clean cuts. Freud recommends ample use of a liquid lubricant when cutting. This can be accomplished with a squirt of WD-40 or other lubricant every 4 or 5 cuts or with an elaborate industrial drip system. Wax sticks are not recommended. Thick MicroGrain carbide tips. Laser cut blade bodies and expansion slots. Kickback reducing design. Tri-metal brazing impact-resistant tips. Covered by Freud's Limited Lifetime Warranty.