As for any antiarmor weapon, a HEAT round achieves its effectiveness through three primary mechanisms. Most obviously, when it perforates the armor, the jet's residual can cause great damage to any interior components it strikes. And as the jet interacts with the armor, even if it does not perforate into the interior, it typically causes a cloud of irregular fragments of armor material to spall from the inside surface. This cloud of behind-armor debris too will typically damage anything that the fragments strike. Another damage mechanism is the mechanical shock that results from the jet's impact and penetration. Shock is particularly important for such sensitive components as electronics.