This is a functional 3D printed toolbox designed to fit in the bed of the FMS FCX24 K5 Blazer. The lid does open and close allowing you to store some scale accessories or whatever else you want. It is able to fit the stock battery, so if you want to store a spare battery while crawling it should work perfectly! The lid does not have a latch so it will likely flip open if you roll, but it my testing it stays closed in pretty much all other circumstances excluding a rollover. The dimensions of the entire box are approximately 97mm x 26 mm x 21mm. The inner compartment is 84mm x 24mm x 12mm. This product is 3D printed, so there may be very slight variations with each box, nothing major though. Please reach via eBay messages with any questions!