The grenade was adopted by the Danish army in 1954. It was also used as a basis for the Swedish version M/56, which has a similar design and differs in certain elements of the fuse. The grenade was developed as a means of defeating enemy manpower in defensive combat, with an emphasis on powerful fragmentation and high-explosive action. Due to its significant mass and dangerous large fragments, its use was intended mainly from cover.
The grenade body consists of a thin outer steel shell and an inner fragmentation jacket of two hardened steel hemispheres about 2 mm thick. The internal elements have wavy edges, which ensure a tight connection and rigidity of the structure. Inside is a charge of compressed TNT weighing approximately 154 g. The total mass of the grenade in the assembled state is about 510 g, diameter - 61 mm. The grenade is equipped with a mechanical fuse with a retarder. In the Swedish modification M/56, a separate safety catch is additionally used.