This high quality hardwood forming block is great for bending and forming without the risk of marring. Lighter weight and less expensive than the steel version, the large grooves consist of 3 half round (1-1/4", 1-1/2", 1-3/4") and 2 larger third round (2-1/2", 3-1/4") channels. The five nylon rollers are used for forming and are durable enough to be used with a hammer. Form bracelet links, give a soft curve to earrings both top to bottom and side to side. Work the metal to desired curve by starting with large depression and working down as you go. Block measures 7" x 1-7/8" x 2-3/8".