1. The installation can be completed without tools and can be installed in the overhanging position. 2. Release the two hooks on both sides of the shield. 3. Spread the cage just enough to clear the sprinkler frame and deflector, taking care not to damage the sprinkler. 4. Clamp the open end of the cage at the bottom of the sprinkler between the frame and the thread. 5. Re engage the two hooks on both sides of the sprinkler. Make sure the concave skirt is correctly repositioned on the nozzle holder according to the nozzle manufacturer's instructions. Use only when the embedded nozzle cover can be installed without interfering with the nozzle manufacturer's correct installation of the nozzle according to the installation instructions and installation instructions. For embedded shield. Re engage the two hooks on both sides of the sprinkler. Suitable for most embedded sprinkler applications. Item Type: Fire Sprinkler Headguard Fit For Fire truck Sprinkler Headcage Colour:Silver Material:metal Package Contents: 8 * Fire Sprinkler Headguard 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.