The OD-55 MagniGrip from Carson Optical is a compact 4.5x Magnifier with attached fine-point tweezer. Lens size is 30mm (1.2 inches). Perfect for all those "little" jobs... when you need an extra hand! The MagniGrip Magnifier is ideal to aid in tying flies. At Carson, we strive to make sure our customers are 100% satisfied with the quality of our magnifiers. We are so confident in our magnifiers that we back them with a Lifetime Limited Warranty! Carson will repair or replace your magnifier if it is found to have manufacturing defects in materials or workmanship. Please contact Carson for additional warranty details.