1.Professional manufacturer of Hydraulic Breaker 2.20 Crmo Alloy Steel 3.Special heat treatment 4.Special smithing technics Yantai Xinren Mechanical & Electrical Equipment Co.,Ltd established in 2009 is one of the largest manufacturer of Hydraulic Breakers and attachments .Our main products including DBK Series Hydraulic Breaker,Front Cylinder,Rear Cylinder,Middle Cylinder,Piston,Inner Bushing, ...