Body Solid Leg Developer Attachment - GLDA1 Leg Extensions are designed for ultimate strengthening of the Knee and Thigh muscles. Leg Curls for maximum concentration of Hamstring and Glute muscles. NOTE: ATTACHMENT ONLY; THIS ITEM CANNOT BE USED INDEPENDENTLY Features 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 Body Solid Leg Developer Attachment Specifications Specification Imperial Metric Assembled Weight 11 lb 4.99 kg Package Dimensions Length 16.54 in 420.12 mm Width 19.69 in 500.13 mm Height 4.72 in 119.89 mm Volume 0.89 ft³ 0.03 m³ Gross Weight 13.20 lb 5.99 kg Thanks for shopping at The Trade Table - The Home Improvement Store!