If you are looking for the strongest adjustable hitch shackle on the market, the BulletProof Extreme Duty Shackle Attachment is for you! Made to work with any of our steel hitches and can be adjusted up or down within the channel. This attachment has been rigorously tested and the design makes it durable, safe and easy to use. Made from high-quality solid steel just like our hitches, features our durable, textured powder coat and is backed by our lifetime warranty. Compatible with all steel Medium, Heavy or Extreme Duty BulletProof Hitches® The Extreme Duty Shackle Attachment is rated for up to 36,000 lbs. *PATENT PENDING