The unique design of the Prestalever allows the rider to hook the lever onto the rim and pivot forward or back for easy installation or removal of clincher tires. The larger-than-normal width of the lever offers plenty of purchase to the rim and tire bead for ample leverage, so very little force is required. The multi layered nylon material with honeycomb core makes the lever nice and stiff, so you will not get any bending or flexing during operation.
This thoughtful yet simple design brings the tire lever design to a whole new level. One lever is all you will need to install and remove clincher tires.