Retrax Retrax IX - 21-26 F150 (Including Lightning) 5'7" Model 30378 15000LB has 4" of drop and

has 4" of drop and comes with a 1-7/8" diameter trailer ball

The chains help attach the spring bars to the trailer

and when you want to remove it

the trademarked lid design locks tools in position

Retrax Retrax IX - 21-26 F150 (Including Lightning) 5'7" Model 30378 15000LB has 4" of drop andRetrax Retrax IX 21 26 F150 (Including Lightning) 5'7" Model 30378 The Retrax IX is a flush mounted retractable tonneau cover constructed of durable aluminum slats linked by a strong elastomer hinge, helping to eliminate the opportunity for water and debris to enter your truck bed. When combined with the UV resistant matte finish powder coat, the cover helps keep your truck bed and cargo protected and secure in the roughest of conditions. The Retrax