From en.wikipedia.org:
[peen] PEEN may refer to:
- Part of the head of a hammer, as in a ball-peen hammer (also _ball-pein_ , or _ball and pein_ )
- Peening , 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
- Peene (disambiguation)
- Pein
- _Peen tong_ , a Chinese brown sugar and sugar candy [disambiguation]