EGC8R G-Clamp 8 Inch-Blue. The Eclipse EGC8R G-Clamp 8 Inch EC20 are a heavy-duty, drop forged engineers steel clamp that is suitable for fabrication and welding. This Eclipse EGC8R G-Clamp have a high quality steel screw with drop handles and are ideally suited to engineering applications. This Eclipse G-Clamp have a steel swivel shoe that applies even pressure.