This is one of the best exercises of all time working the majority of the upper body. The problem has always been the ability to use your own body weight to perform this movement. It is usually sloppy and not done in full range of motion. The Workbench Machine Dip uses the new linkage resistance bar and slide tube to provide perfect lever arm motion which duplicates the exercise in machine form. All Workbench Machine Accessories are quality built and relatively lightweight for quick and easy in and out access. A knob lock pin tightens the accessory during exercise. The Workbench Accessory Storage Rack (WB-ASR) allows you to store your Machine Accessories when not in use saving valuable floor space and keeping your gym neat and organized.