Comprehensive retailer view here. One-piece solid "metal" hammer. Always been a hickory fan and just wanted to try carbide because I have task demos here and there and don't want to ruin my nice wooden grip by losing a few ounces compared to my 19oz hickory. (I'm getting older) Don't let "15 oz" fool you. This is the weight of the head. Received today and weighed 39.5 ounces. While my old 19 ounce hickory weighs 26.8 ounces. So keep that in mind if you currently use a wooden handle and want to try the newer GENX metal hammer. Great for demos. Or for a heavy swing. But for a lighter hammer and faster swing, I'd go with 10-12 oz, which weighs about the same as a 19 oz hickory.