Body Solid Heavy Leg Developer Attachment - GLDA3 Leg Extensions are designed for ultimate strengthening of the Knee and Thigh muscles. Leg Curls for maximum concentration of Hamstring and Glute muscles. Features the ability to lock the pivot creating a leg hold down for lat pulldowns and ab crunches. For commercial rated benches GFID71 and GFID100 For Body-Solid Benches GFID31 and PFID30X, use Leg Developer GLDA1 For Body-Solid Benches GFID71 and GFID100, use Leg Developer GLDA3 Note: All Weight plates, collars, and adapter sleeve shown in photos are sold separately ATTACHMENT ONLY; THIS ITEM CANNOT BE USED INDEPENDENTLY Body Solid Heavy Leg Developer Attachment Specifications Specification Imperial Metric Assembled Weight 15 lb 6.80 kg Package Dimensions Length 21.26 in 540.00 mm Width 19.29 in 489.97 mm Height 4.72 in 119.89 mm Volume 1.12 ft³ 0.03 m³ Gross Weight 17.16 lb 7.78 kg Thanks for shopping at The Trade Table - The Home Improvement Store!