What part of:
is it that you don't understand?
You need to give your arse a chance:
Grad 122mm 9M22, a High-Explosive Fragmentation (HE-Frag), electrically-initiated, fin and spin-stabilised, Ground-to-Ground Rocket (GGR). When detonated the internal scoring of the M-21-OF warhead creates approximately 3,150 fragments which are scattered over a lethal radius of about 28m.