The M2 is an excellent Fingerprint Magnifier that provides 45x magnification using a two-element glass optics system which provides great clarity with a minimum of distortion The magnifier's height adjustment knob allows for easy positioning of the optics Constructed of precision-machined aluminum with an optical black anodized finish The base is designed for use with the PF series of classification discs and features spring-loaded ball bearings allowing full 360 degree rotation of the classification discs