Power tiller blade Material: 65Mn 60Si2Mn Model: 481, 581, 681, IS245 Type: single hold, double hole Package: 20pcs/carton Power tiller bladeThe new tilling blade is forged of the manganese steel with high quality. The body of the colter is not easy deformed and broken.. Though 500 normalization treatment. The tip of the colter is improved 50% in the hardness and wear-resitance and can be used ...