Black Widow HC-FA Folding Hitch Adapter Allows a hitch-mounted carrier to fold up against your vehicle when not in use Requires between 2.5" to 3" clearance from hitch tube end to hitch pin hole Manufactured from heavy-duty steel with a 500 lb. weight capacity Designed for Class III or IV 2" hitch receivers; 5/8 pin hole size Compatible with Black Widow AMC-400, MCC-500 and Apex CC-4820-DLX, CC-6020-DLX, and HS-2 Allows a hitch-mounted carrier to fold up against your vehicle when not in use Requires between 2.5&#034; to 3&#034; clearance from hitch tube end to hitch pin hole Manufactured from heavy-duty steel with a 500 lb. weight capacity Designed for Class III or IV 2&#034; hitch receivers; 5/8 pin hole size Compatible with Black Widow AMC-400, MCC-500 and Apex CC-4820-DLX, CC-6020-DLX, and HS-2