4 socket spike guard and 6 socket Spike Guard are two guards we sell to powder television, desktop computer and other electronic devices. People must use it for guarding expensive devices against electric current. Plugging the devices directly to the electronic socket is not recommended, as the power spike can damage the devices. As we sell large number of Spike Guards at once, we keep the price lower. Attractive pricing is the reason many retailers prefer buy from us. This helps the retailers to set a profit margin when selling each of the spike guard.