Unit Jaw Crushers From the 1524 to the 4450, KPI-JCI Jaw Crushers come ready to be plugged into your new or existing, stationary or portable plant.  Built for rock and recycle, the Legendary and Vanguard Series Jaws offer rugged design and extreme performance. The Legendary Jaw Crusher provides you with peace of mind.  Backed by 70 plus years of reliable performance, and like all KPI-JCI equipment, a one year or two thousand hour warranty. The Vanguard Series offers innovative wears options to save you money, an advanced adjustment system for ease of use, and several other industry leading options to increase productivity.