Industrial Metal Grinders. When it comes to professional-grade industrial metal grinders, nobody has a better selection than Penn Tool Co.We have built our reputation on our high-quality products, such as our heavy-duty metal grinder machines.Were confident that our grinders will go above and beyond your expectations because we only carry the best industrial metal grinders from top brand ... View More. Cas 7440 67 7 Industrial Metal Powders , Zr Zirconium Powder For Nuclear Reactors. View More. Electrolytic Manganese Metal Powder , Aluminum Alloy Powder Additive Cas 7439 96 5. View More. Cr Chromium Powder Industrial Metal Powders Cas 7440 47 3 For Al-Cr Alloy. View More.