From DT Online
They are used to:
- apply force to other tools (e.g. Chisels)
- to assemble parts together without damaging them
- to fold or form soft metal sheets without marking the surface
- to fold metal sheets without stretching the metal (e.g. to form a Safe Edge on Tinplate products)
Note: Wood or plastics handled tools should not be struck with hammers since this may chip or split the handles.