A sliding collar closes spring steel "fingers" around hot buttons, marbles, goblets or irregular shaped objects to assist in holding while working them in the flame. The Small size is ideal for buttons and marbles between 3/8" and 3/4". The Medium will hold marbles up to 1½" in diameter. The Large is for marbles up to about 2"  and small goblets. The three sizes are approximately 9", 10" and 11'', respectively, in length.