Got these to assist in my first tire replacement. Easy to use, maybe not 100% necessary but certainly made it easier to get the tires on and off. Fit nice in my handlebar bag so I have them with me all the time to assist in any tube replacements on the roadtrail.
After one year and change these levers still get the job done. They have rescued many a stubborn tire from damage and make replacing tires easy. Leave the blue, black and coated metal levers on the rack at your LBS and get these. One exception would be those of forged aluminum from the company that starts with an L. The price is right and they do not gouge my seat bags. Good design at a reasonable price.