RKI Truck Bed Side Rail Tool Box
RKI Truck Bed Side Rail Tool Boxes: Built for the Working Truck
When your truck is a genuine work vehicle — not just a daily driver — the storage you bolt onto it needs to meet the same standard. RKI (Rawson-Koenig Inc.) has been building commercial-grade truck equipment out of Houston, Texas for over 40 years, and their truck bed side rail tool boxes reflect that heritage in every weld and latch. These boxes mount along the bed rail of your pickup, keeping your tools organized and accessible without sacrificing the open bed space you need for cargo, lumber, or equipment.
S-Series and SLP-Series: The Flagship Side Rail Lines
RKI's side rail tool box lineup centers on two core series. The S-Series Standard Single Lid Side Mount Tool Box is designed to run the full length of your bed rail — available in approximately 50" and 61" lengths — making it a go-to choice for tradespeople who need high-capacity, long-reach storage on one or both sides of the bed. The SLP-Series Low Profile Single Lid Side Mount Tool Box shares the same rugged footprint but sits lower on the rail, preserving sightlines and keeping an aerodynamic, clean profile that works especially well on work trucks where cab visibility matters.
Both series are also offered in the STS-Series, a slimmer-depth variant designed for tighter bed configurations. All mounting hardware is included with every box, and RKI engineers the mounting clamp system to eliminate the need to drill through your pickup bed rail — a detail that protects your truck's resale value and prevents corrosion at penetration points.
Steel and Aluminum Construction — Commercial Grade Through and Through
RKI manufactures their steel side rail boxes using a minimum of 14-gauge cold-rolled steel, fitted with high-security stainless steel latches and hinges. A tough polyester powder coat finish is applied in either black or white, giving the boxes long-term resistance to rust and UV degradation. For buyers who prefer lighter weight without sacrificing toughness, RKI also offers aluminum side rail boxes built from bright diamond-treadplate aluminum with smooth aluminum bottoms — paired with sealed gas shock lid supports on all top-opening models for one-handed, effortless access even with gloves on.
Weather-resistant door seals run the full perimeter of the lid, keeping out rain, road spray, dust, and debris — critical for anyone storing hand tools, power tools, or sensitive equipment on a daily work truck. The spring-assist lid opening on steel models and gas-shock arms on aluminum models mean these boxes are designed to be opened and closed hundreds of times a week without wearing out the hardware.
A Lifetime Warranty That Means Something
RKI backs their truck bed side rail tool boxes with one of the most comprehensive lifetime warranties in the industry. This reflects the company's confidence in a product line built with quality materials and workmanship — a philosophy that has made RKI a trusted name among oilfield service crews, contractors, and fleet operators across the country.
With 63 side rail tool box configurations available, ranging across finishes, lengths, depths, and materials, there's an RKI side rail box suited to virtually every full-size pickup application. Browse the full RKI brand catalog or explore the complete truck bed side rail tool box category to find the right fit for your truck and your trade.