One advantage of a flexible magnifier is the ability to manipulate the lens to provide a comfortable, unobstructed field of view.
This 4" magnifier has a four-diopter, optical acrylic lens mounted to a flexible gooseneck. Ideal for carvers, hobbyists, crafters, etc., it has a large molded-plastic base for stability and won't accidentally tip during lens adjustment. The base has a footprint of 7" × 6". The neck is 12" long.
Made in USA.
A word of caution: It is best not to leave any magnifier where sunlight can strike it. The focused rays can cause a fire.