Tumbl Trak™ Closed EndMake your In ground Tumbl Trak safer by closing off the hole at the opposite end of the dismount. A Closed End is recommended for either of the ends of the In ground Tumbl Trak if they are not dismounting into a pit. When ordered with your In ground Tumbl Trak you would receive a Closed End Steel frame piece, Closed End Pad, Extra Springs and D rings on one end of your bed. You can purchase the closed end later, however you will also have to purchase