Here is a Edmund Optics handheld 12X magnifier that swivels 360 degrees on its base.

Type of Optics: Kellner-type AR Coated

Diameter of included lens: 0.68"

Field of view: 0.625" (5/8")

Working distance: 0.5" (1/2")

Height in inches: 1.5"

Weight (g): 50.5

Dimensions (inches): folds to 2" L x 1.125" W x 1.5" H