HEAVY DUTY HANGING SET - Constructured of refined 304 stainless steel with diameter up to 0.4 inch, tested to maximumly hold 820LB in experiment. FREE TO ASSEMBLE - The included arc base, spinner hanger, and snap lock can be used separately or assembled conveniently and freely for mutiple applications. FIT WOOD CONCRETE -Ceiling hanging kit set provides 2 way for mounting on wood beam and concrete beam. You do not need to purchase extra anchor bolts for brick or concerete beam. Please refer to the sizing table to drill holes. VERSATILE FOR INDOOR OUTDOOR - Free assemble to help set up heavy punching bag, porch swing, hanging chair, trapeze, yoga strap and more occasions indoor and outdoor. Mutiple applications The included arc base, spinner hanger, and snap lock can be used separately or assembled conveniently and freely for mutiple applications. Recommends 1. Please check the whole set to ensure all joints are under good condition before installing. 2. Make sure that the beam can hold the weights. 3. Drill holes based on the sizing table. Package Content 1x arc base 1x spin hanger 1x snap lock 2x screws 2x anchor bolts