1: Remove the flint screw and take out the spring and flint. 2: Place the windshield in the direction of base B, use No. 1 gun to align the rivets and shoot out the rivets. 3: If the windshields on both sides of the steel wheel are deformed, use pliers to flatten them. 4: Install the new steel wheel, install the rivets in the before direction, install the flint and spring screws, and try to hit the steel wheel 3-5 times. If the sparks are relatively large, it means the direction of the steel wheel is correct. If the sparks are small, change the direction of the drum. 5: Place the windshield towards the direction of base A. Use No. 2 blunderbuss to open the rivet blunderbuss a little. It does not need to be too tight. Colour:Silver Material:steel Package Contents: 1 * Disassembly base 2 * Gun gun 2 * Grinding wheel 2 * Disposable rivets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.