Holeless lifts are called so because they do not use a conventional piston/casing arrangement. Holeless lifts come in many different styles.
The two predominant types are direct-acting and roped. Holeless hydraulic lift equipment is typically more expensive than in-ground equipment; however, the additional expense is offset by the high cost of drilling a jack hole. Thye other benefit to hole less equipment is that there is no possibility of an environmental contamination.