This high quality tool includes the ability to use any one of four different self-contained magnifications. Each visor has a permanent fixed lens along with a unique fold-down lens and pivoting outside loop. By modifying the different combinations you can activate magnifications of 1.8X, 2.3X, 3.7X and 4.8X. the Magna-Visor can be adjusted to a comfortable fit by using the proven hook-and-loop system on the head-band.