Crushers are one of the major size reduction equipment that is used in metallurgical, mechanical, and other similar industries. In industry, crushers are machines which use a metal surface to break or compress materials into small fractional denser masses. At present, Ethiopia's economic construction and rapid development enhances the need of the gravel and aggregate for the construction site. The normal weight coarse aggregates for the Ethiopian construction sector are produced by both, traditional and modern means. In preparing crushing it manually by hammer which consumes long time, take maximum money, need many human powers and has many injure on human body. So impact stone crusher machine will come over these problems.