Well this is a sample I made first. The handle is 3/8" copper tubing bent with my tubing bender. Then it's rivited to metal duct strap. The problem is cleaning it. stuff gets in the rivit holes. So I'm going to make a new one. But this time braze the copper to the duct strap so all of my joints are solid. No cracks for hamburger meat to get into. Another question is it sanitary to use these metals with food? Lol I believe so. I have seen plenty of cooking ware made of copper. But maybe it's treated. I should be ok though because water pipe is in copper. What is your input to my hamburger cutter. We all know how sharp duct strap is.