marteau à panne ronde → ball-peen hammer, ball-pein hammer, ball-pane hammer, machinist's hammer, engineer's hammer
A ball-peen (also spelled pein and pane hammer, also known as a blacksmith's, engineer's or machinist's hammer, is a type of peening hammer used in metalworking. It is distinguished from a point-peen hammer or chisel-peen hammer by having a hemispherical head. 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.
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