Designed for applications involving extension booms with higher than average underclearance requirements. Easily mounts on forks to lift tall objects up to 4000 lbs. Basic construction the same as other Hercules® boom-lift attachments. Restraining chain, extension lock, welded-on hand pull and dual movable safety-latch hooks standard. Each 72-747A fork pocket is 7 1/2"Wx2 1/2"H with a 20"W base. Individual fork pockets on 72-749D are 7 1/2"Wx2 3/4"H with 21"W base.