Sortimo WorkMo Storage Drawer 24 500 With 4 Cases 16 In x 21 In x 20 In Model 1000003823 GM Van The spring loaded hook automatically springs 0 The spring loaded hook automatically springs back once a box has been removed Details Bedslide 1000 Classic Features Black Finish 1000Lbs Capacity (Evenly Distributed) 75 Percent Extension Perimeter Guardrail Kit To Secure Cargo Exclusive composite light weight decking is durable in all elements Full Width Grab Bar For Easy Access From Either Side Multiple Locking Positions For Safety And Convenience Bedtrax With D Ring Tie Downs For Cargo Management Heavy Duty Cam Follower Bearings And Hard Latch System Lifetime Warranty Available With Registration which prevents the BOXXes from sliding out 2 x C3 blue)