I have had two Conduct-A-Light Inspection Kits for over 30 years and they have paid for themselves many times over. Being able to shine light and see behind panels, dashboards, walls, etc. has saved me a lot of time that would have been spent taking things apart unnecessarily. The quality was great back then, and these units look to be identical. The only change that I have made recently was swapping out the old 222 incandescent bulbs for LEDs. I expect they will be in use by made grandsons someday.