Stielhandgranate
Stielhandgranate (lit. "Stick hand grenade") is a series of World War I and World War II–era German hand grenade designs, also known as the Potato masher (Kartoffelstampfer), Doorknocker (Türklopfer), or Jam-pot and stick grenade (by the British in WWI), The first models were introduced by the Imperial German Army during World War I and the final design was introduced during World War II by the German Wehrmacht.