Attach it to the front or rear of the WR - 02 chassis (such as Wild Willy 2) that adopts a right and left split structure and the front or rear of the GF - 01 chassis (Toyota Land Cruiser 40 pickup) to increase chassis rigidity. Even when a large force is added, the chassis will not open, preventing sand and dust from entering the gear case. Blue alumite color has enough dress up effect. When installing in front and back, 2 sets are necessary.