The Dual Speed waste tire shredder machine is equipped with YUXI patented “Multi-Stack” knife configuration. This system utilizes replaceable knife inserts made of through-hardened tool steel. These knives can be reground, repositioned, and used a total of 3 times. On average, the YUXI Shredder knifes will be able to process 320,000 PTE (Passenger Tire Equivalent) peruse. With the machine's ability to utilize its knifes 3 times it will be capable of processing roughly 960,000 PTE’s per knife set. This allows the system to produce the cleanest cut chips with the least exposed wire.