Marteau de cuivre

Car parts such as brake drums, which would be damaged by a blow from a steel hammer, can, if necessary, be struck with a flat-ended, soft-faced nylon (or rawhide) hammer.

For some parts, such as threaded components, a slightly harder copper faced hammer is useful.

Hammers with copper or nylon faces can be bought separately, or there are dual types with a copper face and a nylon face.