This 4X Buasch & Lomb folding pocket coin magnifier is a great product for its size and practicality. It is easy to carry in all types of dress and is excellent for identifying maker's marks, verifying authenticity of relics, and differentiating off center stampings on blades, barrels, rings, castings, plates, etc. It is well worth the price, with proper care, and is perfect for viewing small print. However, the manufacturing process is poor, with excessive distortion around the edges.