This marble features a durable aluminum handle for good weight transfer and balance and easy handling. It features a 2″ x 3″ graphite block mounted to a 6″ long aluminum handle. It has a 5/8″, 7/8″ and 1″ diameter indentation for shaping marbles and spheres. Manufactured by Griffin Glass Tools in the United States for a long service life. All Griffin Tools are designed and produced with extreme quality and durability. The graphite for the head is engineered from industrial grade, fine density high-grade graphite which has been machined to a smooth finish. Designed and produced by a longtime lampworker, Scott Griffin, who builds glass tools to be an integral extension of the hot glass artists’ talent.