PROGRIP 823020 Truck and Trailer Bed Cargo Tie Down Anchor Removable Bolt 5/8" diameter x 4" Shank (Pack of 2) Removable eye bolt that acts as the foundation in tie down technique while moving cargo in your truck or trailer bed; longer than standard bolt allows use with thick material and heavy-duty application Constructed with zinc plating to help prevent corrosion in extreme weather conditions; sturdy bolts feature a break strength of 4,000lbs. and a working load limit of 1,333 lbs. Features welded on D-Ring allowing rotation and superior strength; Easy to use and allows ease of mind that your cargo is secure during transport Unique design of bolt allows user to remove eye of bolt while cover application provides a smooth surface when not in use Truck and Trailer Bed Bolt measures 5/8" diameter x 4" shank; comes in pack of two