First of all it's a nice little walnut handle. The set included a metal wedge. According to the item description, it is an 8-12 oz hammer. I don't think so. The handle is too flimsy and too small for anything larger than an 8oz ball stop hammer head. I have attached some photos for your reference. This pen is on the right in my photos. I've included a 12oz ball-point hammer head and a different, more precise handle in the photo. As you can see from the photos, this grip is too thin on the neck for a 12oz hammerhead.