Cross Pein Hammers (aka Peen) are general purpose carpenter's hammers used for driving in nails. They are also known as Warrington Pattern hammers A cross pein hammer is a hammer used by blacksmiths to complete metal work The Cross Pein is used to start the nail then the hammer is reversed and the nail driven home by the flat face The wedge-shaped end of the hammer allows you to make the metal fuller when used with heat. The main functions of a cross peen hammer is forging and riveting. A lighter variation of the cross peen hammer, this tool isn t well-suited for metalwork. Instead, it s most useful in cabinet work, light joinery, and other woodworking tasks Length X Width X Height (cm) : 33X6X4 & Weight (kg) : 0.312