Based on our OWN experience with this industrial and scientific equipment we highly recommend the Micrometer Ball Attach for dimensional measurement. It is easy to use and provides precise results for diameters up to 250. The stainless steel construction adds durability and the attachment holds up well for repeated use .The only drawback we found is that it may need more cleaning to maintain accuracy, but this is a small tradeoff for the quality of measurements. Overall, we consider this product a great investment for inspection and measuring needs..