Build boulder shoulders and poppin’ pecs for that iconic V-taper look! Dumbbell shoulder and chest isolations suffer from inconsistent resistance, but the Shoulder Boulder’s design provides smooth, controlled movement with a superior resistance profile.A standalone rear delt/chest fly station takes up a whopping 5-foot x 5-foot footprint (or more), while this rack attachment mounts to your rack to save space. Easily adjust its height on your power rack for the ideal fit.This nifty unit uses weight plates, saving you money. Plus, easily micro-load the smaller muscles of your shoulders to minimize injury and get better gains!While it doesn’t beat a cable machine for chest flies, the Shoulder Boulder comes in as a close second. Set it low & wheel over a bench (or mount a Seal Row Pad) for better chest flies that keep the tension exactly where it belongs: on your pecs.Compatible with Hydra & Manticore racks. Also compatible with non-B.o.S. racks with a 3” width or length & ⅝” holes.IMPORTANT: For user & equipment safety, ensure your rack or cable tower is bolted down or otherwise secured. Locking on your weight plates with collars is highly recommended.Download The Shoulder Boulder Product Manual