cast pot metal MIM material, broke second time I used it, tips will break off easily, spend more get a better made product, nice tool as far as design and concept. Good vendor, they are accurate and ship fast. Would not buy again.  If you don't know what MIM is look it up on Google, it's an inexpensive way to make cast metal products, this is not a precision milled product from forged  steel like I thought it would be.  Cheapo import