Thunder crash bomb
10th-century Chinese hand grenade / From Wikipedia, the free encyclopedia
The thunder crash bomb (Chinese: 震天雷; pinyin: zhèntiānléi), also known as the heaven-shaking-thunder bomb, was one of the first bombs or hand grenades in the history of gunpowder warfare. It was developed in the 12th-13th century Song and Jin dynasties. Its shell was made of cast iron and filled with gunpowder. The length of the fuse could be adjusted according to the intended throwing distance.