Given the task definition and input, reply with output. In this task, we ask you to elaborate the sentence without changing its general meaning. You can do so by explaining further the input sentence, using more precise wording, adding qualifiers and auxiliary information etc.

Though the process of peening has become rarer in metal fabrication , the ball-peen hammer remains useful for many tasks , such as striking punches and chisels .
Though the process of peening ( surface hardening by impact ) has become rarer in metal fabrication , the ball-peen hammer remains useful for many tasks , such as striking punches and chisels ( usually performed with the flat face of the hammer ) .