American Barbell GHDAnyone who has ever attempted to adjust a Glute Ham Developer knows it doesn't always come easy. American Barbell set out to revolutionize this fine product with our unique adjustment system. Our locking mechanism ensures safety and stability without ever compromising the proper fit. The heavy duty roller and hip pads are built to sustain comfort while taking a proper beating. Don't plan on buying another one for a long time. The American Barbell