Obtain a perfect fit with Extang’s new sealing system and self- draining L-Channel™

• A great solution for truck owners who previously own a tool box, no matter what brand.
• Tool Box Tonno system fits most standard tool box sizes.
• Simple D.I.Y. measurements required for a perfect custom fit.
• Extang engineered black anodized L-Channel™ offers several benefits: easily bridges the tool box-to-tonno gap for a perfect fit, visually blends that gap for great looks, allows an adjustable sealing system, provides rain drainage.

• Custom-Cut available for non-standard size tool boxes.
• It is a tool box sized version of our top selling Classic Platinum™ Tonno with all it’s metal components for a long durable life.
• The Best Warranty: Lifetime Frame and 10 Year Tarp!

Snaps are your tonno’s most important part

Fiberglass reinforced nylon formula makes the BlackMax’s snaps strong and durable. Tested and proven under intense usage for years in the lab and field. Extang’s patented “MAXSNAPS™” will not break.

Corners securely attach

An easy pull disengages your tail rail for bulk hauling. To resecure: slide and click, your tail rail is locked in place. You’ll be impressed with CLICKLOCK’s high quality spring loaded stainless steel ball bearings that click into place with such a satisfying feel.

Quicker installation

Bows will never fall off

The MONSTER BOWS™ ends are spring loaded for easy installation. They will never fall off at any speed or even with the roughest driving conditions. Simply push and hold on one end and let the other end slide on using the spring action. They are Extang engineered for simplicity, speed of install and everyday convenience and confidence.

Tarps designed for strength & good looks

Corners don’t buckle up due to parachute grade nylon corner reinforcements.Snaps & corners are backed with thick polymer forcing the corners and edges to lie smooth and look good in any weather. The thick polymer edging also keeps your snaps from ripping out!

Extang’s SNAPSTOPPER™ is a small detail that means a lot. Roll up your tarp, carry a large load and the snaps will stay on the rail.

Bow height adjustment

Extang’s Monster Bows™ quickly spring on and off with no tools. It’s fast and easily done with one hand. The TUFFKLAMPs™ allow two bow heights: HIGH for maximum water shedding in harsh weather, and for improved gas mileage. LOW for sporty good looks and cold weather tonno attachment.