Based on my observations, this tool holder is a GREAT addition to my cutting tools collection. It is made of high-quality materials and its standard diameter fits most of my tools perfectly. It is also very resistant to wear and tear, which is essential for my line of work .The only downside I have experienced is that it is a bit heavier than other tool holders I've used in the past. Overall, I am satisfied with this product and would recommend it to other professionals in the Industrial and Scientific field..