They seem sturdy and the size is convenient.
I like SILCA products, but these are a failure. Like another reviewer also mentioned, they are metal and will damage rims. The nylon coating is very thin, and the first time I used them, the metal tip left ugly scratches on my alloy rim’s anodizing despite taking utmost care to avoid tip to rim contact.
The nylon coating is on the bottom of the lever to protect rims while removing tires, but levers should not be used to install tires which is when damage can occur.
These levers work great, I carry a flat pack on each bike and replaced the levers in each pack with these.
The levers are typical SILCA — thoughtful design and practicality through and through.
Plenty of leverage for the challenge of mounting German tires into French wheels. Also the levers are narrow enough to pop into the bead without requiring any additional tool or individual. Worth more than their weight for so.