The BDC 10 was a cluster bomb used by the Luftwaffe during World War II.

The lower half of the metallic band is attached to the upper by wire hinges held together by two safety pins, one on each side.

These pins are attached to the outer arming spider by small chains.

[1] On release from the aircraft an electric cap is fired and after a short delay, this ignites a small charge which blows off the spider, which pulled out the bombs safety pins and the safety pins which held the band together.

They differed in their construction details but their dimensions and performance were similar.