The Utoolmart industrial drill bit I recently purchased had reduced diameter but it delivered an impressive performance that surpassed my expectations. As my tests showed, it had excellent PRECISION and accuracy in drilling through various materials .The durable high-speed steel used in its construction ensures longer lifespan and better value for money. The only negative aspect is the price which is a bit on the higher side compared to other products in the market. Overall I am highly satisfied with the results..