Bench anvil, anvil can vary slightly from picture Ring Mandrel Bench pin for sawing and forming The jewelers bench anvil basic combination kit includes a ring mandrel, a bench pin, and the bench mounting system which has a flat anvil surface on top. The ring mandrel is hardened steel, perfect for hammering on, and has U.S. sizes 1-15 marked on it. The ring mandrel is 8.75” (22.2 cm) long plus the tang and is secured into the system with a thumb screw. The hardwood bench pin measures 6 x 2 x 5” (15.3 x 5 x 12.7 cm) and is cut with a V-slot. The unit is held securely when the whole device is clamped to a table with the screw mechanism. The mechanism can clamp to a table up to 2.25” (5.7 cm) thick.