RYOBI introduces the RYOBI 150 PC. Twist Lock All-Purpose Kit. Featuring the RYOBI Twist Lock Mandrel which helps secure the accessories during use and prevents the accessory from coming loose. This set is perfect for multiple applications with options for cutting, carving, engraving, cleaning, polishing, and grinding. This set contains interchangeable bit bars. These bit bars are interchangeable with drill drive cases as well as the RYOBI LINK Storage System.