The BulletProof Accessory Clamp was designed to make BulletProof accessories solid within the channel of your hitch. The clamp also helps to prevent theft by requiring the supplied offset wrench to remove your accessory. Installation is simple - drop the clamp behind the dual ball or accessory, tighten the bolt by hand and finish with the supplied offset wrench and all movement is eliminated. The BulletProof Accessory Clamp is NOT compatible with the following accessories: Pintle Attachment, Loop, Medium Duty 2-Tang Clevis, Heavy Duty 2-Tang Clevis, Medium Duty Weight Distribution Adapter or Heavy Duty Weight Distribution Adapter