This NorthStar Horizontal/Vertical Log Splitter's multi-patented design gives you premium components and exclusive features that let you save time, increase performance and work effectively. You can count on NorthStar to bring strength, durability and innovation every time. The backbone of this log splitter is an industrial-strength I-beam with heavy plate steel reinforcement. The patented wedge design, made with alloy steel, maintains consistent split and has a unique curve that reduces initial contact area for maximum penetrating force. Add the optional NorthStar Wedge Wings (Item# 110910, sold separately) to make each stroke more efficient. Auto-return wedge saves time and effort when splitting. The premium hydraulic system is protected by a quad filtering system that uses four different components to protect the hydraulic system from contaminants. Large hydraulic oil reservoir allows fluid to cool, reducing wear and allowing fluid to last longer. Slide-action self-leveling pivot makes it simple to switch between horizontal and vertical split. Designed to be easy to use in both orientations. Some assembly required.