Halder 3202.040 Simplex 1.57′ Replacement Insert, Hard Black Rubber
The black rubber Simplex face insert is made from a hard composite rubber material. It is hard enough for almost any tough jobs but since it is rubber, it does so without damaging the material you are working on. It is commonly used for paver work and masonry work as well as fence construction and general construction. It is a really useful hammer to have around in any work setting.