Features: Equipped with Gas Springs to dampen vibration  For Heavy Bags 70 lbs to 130 lbs  Fabricated from 3/16" steel for superior strength Every Ceiling Mount is assembled to a specific bag weight +/- 10lbs Gas shock can be changed to accommodate different bags Easily attaches to open joists, drywall, concrete, and unistrut Black Textured Powder Coating for Durable Lasting Finish Installs in minutes All mounting hardware included Does not include the swivel or Extensions  Made in USA  Accessories: GS Ceiling Mount Extensions - For Beams or Joists that are not 16” on center, 24" extension.     Data Sheet and Installation