Stop searching on your hands and knees for the hole in your receiver to insert the mounting bolt or pin.  With the Hitch Bar Stop & Hole Locater Clamp, simply slide your hitch bar into the receiver until it stops.  Now the receiver and the hitch bar holes are aligned and ready for bolt or pin insertion.  The aluminum clamp slides on to your hitch bar and is locked into place with a set screw.  $4.15 shipping fee.