Peen may refer to: * Part of the head of a hammer, as in a

ball-peen hammer A ball-peen or machinist's hammer, is a type of peening hammer used in metalworking. It has two heads, one flat and the other, called the peen, rounded. It is distinguished from a cross-peen hammer, diagonal-peen hammer, point-peen hammer, or c ...

(also ''ball-pein'', or ''ball and pein'') *

Peening In metallurgy, peening is the process of working a metal's surface to improve its material properties, usually by mechanical means, such as hammer blows, by blasting with shot ( shot peening), focusing light ( laser peening), or in recent years ...

, the changing of a metal's properties by impacting its surface ** Shot peening, bombarding metal parts with small spherical media *** Shot peening of steel belts, a remedial solution for deformed steel belts ** Laser peening, focusing lasers on the surface of a metal part ** Peening (scythe blade), peening a scythe or sickle blade as a step in the sharpening process

See also