Reas double-toggle (Blake type) jaw crushers are generally preferred in the rock quarries located in Turkey. The moving plate of a single-toggle jaw crusher swings during crushing.The original double toggle jaw crusher was designed by Eli Whitney Blake in the USA in 1857 . The motion of the swing jaw in a double toggle crusher is such that it applies an almost purely compressive force upon the material being crushed. This minimizes wear on the crushing surfaces of the jaws and makes the double toggle jaw crusher suitable.