The primary crushers I purchased exceeded my expectations. They were durable, efficient, and simple to use. I was able to easily crush large rocks into smaller sizes using minimal effort. These crushers were perfect for my mining operation, as they allowed me to process materials quickly and effectively. The build quality was top-notch, and the components were heavy-duty, ensuring that they could withstand daily use in harsh conditions. Overall, I highly recommend these primary crushers to anyone in need of reliable and efficient equipment for crushing large materials.