1. Plug compressed air line to tool.
2. Slide boot onto arms, large end first. The arms should just protrude from the small end of the boot.
3. Press button until arms open enough to pass over the joint.
4. The air line can now be disconnected. The arms will remain open until press release button.
5. Place SpiderBoot over CV joint and press release button.
6. Slide the boot from the SpiderBoot onto the axle and withdraw the SpiderBoot over the joint, leaving the boot in position. Complete the installation in the standard way.