ProTech Underbody/Top Mount Box 18X18X48 R/H Double Smooth Barn Door Style Bright Aluminum Model 20-2275R 39 Gallon you know it is bolted

you know it is bolted in there to stay

#48601 or #48660 or CURT channel-style couplers #25319

and they are commonly used on trucks

3500 and Dodge Ram 1500 regular cab (see application information to verify vehicle fitment)

Truxedo TruXport Tonneau Cover - Black - 1982-2011 Ford Ranger 7' Bed Model 250601

ProTech Underbody/Top Mount Box 18X18X48 R/H Double Smooth Barn Door Style Bright Aluminum Model 20-2275R 39 Gallon you know it is boltedProTech Underbody Top Mount Box 18X18X48 R H Double Smooth Barn Door Style Bright Aluminum Model 20 2275R ProTech Underbody Top Mount Boxes Secure, Weather Resistant, and Built to Last. ProTech Storage Boxes are engineered to provide unparalleled security and weather resistance. Designed for mounting on top of flat surfaces, these rugged boxes are as tough as the job demands. Dimensions: 18in H x 18in D x 48in L Secure storage to protect your tools