As a result of my tests, I determined that this replacement drill was not up to par with other industrial and scientific cutting tools on the market... Although it was easy to install, the overall performance left MUCH to be desired. The only positive aspect was its affordability. Unfortunately the cons outweighed the pros as this replacement drill lacked the durability and precision necessary for heavy-duty projects. I would not recommend this product to anyone in need of a high-quality industrial drill bit replacement..