Run it
Copy the script and paste it into your executor.
local function hitboxextend()
local zombies = game.Workspace:FindFirstChild("Zombies")
if zombies then
for _, hitbox in pairs(zombies:GetDescendants()) do
if hitbox:IsA("Model") and hitbox:FindFirstChild("Head") then
local head = hitbox.Head
head.Size = Vector3.new(5, 5, 5)
end
end
end
end
while true do
hitboxextend()
wait(0.5)
enddoesnt work for gluttoany zombies and toxic zombies

Universal