Review on Drilling Systems Extension by Insty Change by Adam Peterson

The Industrial and Scientific category is meant for top-of-the-line products, but this extension is subpar at best. Through trial and error, I found that the extension couldn't handle drilling through tough materials without breaking or bending. The only pro was that it fit easily onto the drill, but that didn't make up for its poor performance. Save yourself time and money by investing in a better quality product.