We have listed the top 20 best ball pein hammers for woodworking. The ball peen hammer, also known as a machinist's hammer, is a robust and practical instrument that can use in homes, businesses, and professional settings. One of their two heads is flat, while the other is spherical. The peen is the term for the rounded head. These hammers that used for a broad range of tasks and projects, including driving rivets into position.