Product size (cm) : 39*15*7; Gross weight (including package)(kg) : 8kg; Durable and durable good materials: the products made of excellent materials have a longer lasting and durable life. Safety protection safety bolt design: intimate safety bolt design, safety protection; Convenient and comfortable handle design: intimate and comfortable handle design, comfortable to use; Convenient and intimate oil return valve design: tighten when working and relax when relieving pressure; Overall scientific design of practical science: Overall scientific design, practical science, to improve the efficiency of use; Scientific and practical thickening design: scientific and practical design, safe use, improve the use efficiency; 1. Before each shift operation, it is necessary to check whether the fasteners are loose, and if so, tighten them; 2. After each transfer, use oil or diesel oil to clean the main body and the surface for longer use;