Replaceable, rectangular, and medium hard inserts made of polyurethane.Allows for noise-dampening and completely non-rebound work.Extremely high impact force at low weight.Perfectly break-proof connection between hammer head and handle thanks to the longitudinal welds of the housing.Available in two sizes: 680g and 1,000g with impact surfaces measuring 30 x 40mm and 35 x 45mm, respectively.