sheet metal grip light c clamp better toughess G clamp because of its welded 2 layer carbon steel ... body,powder coating zinc pl sheet metal grip light c clampmaterial:welded 2 layer carbon ... . Cast iron clamp is easy to break ,yet our G clamp works with better toughness.color could be changed as ... platedsize:2",2.5",3",4" sheet metal grip,g clamp,c clamp,light c clamp