Also known as Hastings Triplet magnifiers, these have three glass lenses bonded together for sharp, distortion-free images. Since the lenses are glass, they are less prone to scratches and give you a clearer view than plastic lenses. Slide the magnifier to open and close. A metal case protects the lenses when in storage and serves as a handle when in use. Since they’re handheld, they work well to inspect equipment and parts on the go.