A jaw crusher is a heavy-duty machine used primarily for primary crushing in industries like mining, quarrying, construction, demolition recycling, and aggregate production. It breaks down large, hard, and abrasive materials—such as rocks, ores, concrete, or gravel—into smaller, more manageable sizes through mechanical compression. Jaw crushers are versatile, reliable, and often the first stage in multi-stage crushing systems, with some models also suitable for secondary crushing.