Single Lid Crossover Tool Boxes

Shop single lid crossover tool boxes: crossover (saddle) boxes with one wide lid that opens the whole box at once. They span the bed behind the cab and rest on both bed rails, for full-size and mid-size pickups. This is the largest crossover style we carry, with boxes from UWS, Highway Products, Weather Guard, Better Built, TrailFX, Dee Zee, RKI and more. Compare all styles in crossover truck tool boxes.

Single Lid vs. Gull Wing

A single lid gives you one large opening and the full width of the box at once, which suits long tools and bulky gear. A gull wing truck tool box splits the lid in two so you can open it from either side of the truck.

Profiles and Tubs

Single lid boxes come in standard and low profile heights, with standard, deep or angled tubs below the rails. Compare listed dimensions and volume on each product page.

Sizes and Materials

Full-size pickups typically take a box around 69 to 72 inches; mid-size trucks around 60 to 63 inches. Choose aluminum for lighter weight and rust resistance, or steel for lower cost.

Single Lid Crossover Tool Box FAQs

Which side does a single lid open from?

A single lid is hinged along one edge of the box and lifts from the other, so you reach in from one side of the truck. Check the product page for the hinge side and lid support details.

Is a single lid box more secure than a gull wing?

Security depends on the box's locks, latches and construction rather than lid count. Compare the lock details on each product page.

Do single lid boxes come in low profile versions?

Yes. Many single lid crossover boxes come in a low profile height that sits lower above the bed rails.

What size single lid box fits my truck?

Box length matches bed width: about 69 to 72 inches for full-size pickups and 60 to 63 inches for mid-size trucks. Use the vehicle filter to narrow the list.