Frag grenades are one of the cheapest items in the game. They are priced at 6 for $600. They are one of the most powerful items in the game, and they can take out the toughest of zombies. The only major setback with this item is the low blast radius, compared to other explosive items like the Mine. Should the grenade be thrown and misses a zombie, the grenade will roll around on the floor for 1.5 seconds before detonation. Should the grenade be thrown and hits a zombie, the grenade will instantly explode.