DIME (Dense Inert Metal Explosive).
They aren’t secret but not many people know about them.
According to Wikipedia:
>Dense Inert Metal Explosive (DIME) is an experimental type of explosive that has a relatively small but effective blast radius. It is manufactured by producing a homogeneous mixture of an explosive material (such as phlegmatized HMX or RDX) and small particles of a chemically inert material such as tungsten. It is intended to limit the distance at which the explosion causes damage, to avoid collateral damage in warfare.
Their use has been made illegal but Israel allegedly used them in the Palestinian conflict.
