I bowled about 15 games. There's a hole for a 2-some. No plug work has been done. The traditional 3-piece core and the new "High-Impact Pearl Urethane" coverstock will provide you with a highly predictable reaction for a long time. Bowling Brand: ROTOGRIP Core: 3-piece core Suitable Lane: Spare Coverstock: High-Impact Pearl Urethane Stored at home, inspected by an amateur, so please purchase only if you understand that this is a used item.