Commercial Boxing Frame must be bolted to the floor. Comes with Dyna Bolts Please consult a build for the best fixing method. An incredible heavy bag hanging option for home or professional gym use. Extra heavy-duty powder-coated boxed steel is unbelievably sturdy and built for intense action. Crafted to support heavy bags to 70kg. 12" x 12" base is pre-drilled for attaching directly to the concrete floor, which virtually eliminates any noise, vibration or movement. Vertical design occupies little floor space, yet allows full 360-degree access around the bag.