Best Truck Tool Box Behind The Seat (2026): 5 Picks Compared

Best truck tool box behind the seat: compare the picks

Specifications are manufacturer rated, as published on each listing and collected 5 November 2026. Where a listing contradicts itself, each figure is shown.

How the points were given

Each box is scored on performance, build, value, safety and warranty, with the weights published on the How We Pick page. None of the listings states a safety listing, so no box earns safety points, and only 1 of the 5 gives a concrete warranty term.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.

What the listings tell you

This roundup covers 5 listings. All 5 are under-seat boxes or bags for full-size crew cabs, and all 5 list Ford F-150 fit. Only 1 states a concrete warranty term, and none states a safety listing. Two listings give figures that do not match their own titles, so the review for each one names the mismatch.

Buying guide: fitting a box behind the seat

Fit and cab

Every box here is built for the space under a full-size truck back seat, and all 5 list Ford F-150 fit. Measure the space under the back seat before ordering: the listings give outside lengths from 20.0 in to 49.5 in, and a box that is too long will not sit flat under the bench. GEEDAR also asks buyers to measure before purchasing.

Hard box or soft bag

Hard boxes hold their shape and wipe clean: the MTM crate is molded polypropylene, the DiffCar box is molded impact-resistant plastic, and the FengYu box is hard plastic. Soft bags fold away when the seat needs to carry passengers: the GEEDAR box folds flat and the MIKKUPPA bag folds with a detachable hard board that keeps its shape while in use.

Compartments and dividers

Dividers keep sockets, hand tools and straps from shifting while driving. The MTM crate has two removable dividers, the DiffCar box has internal dividers plus a detachable bin and a mesh net, and the MIKKUPPA bag has 3 compartments. The GEEDAR title lists 3 compartments, but its bullets describe a two-compartment box and a single-compartment box, so read the size lines before ordering.

What to measure first

Measure length, width and height under the bench, then match the listing size to the tape: the MTM crate lists an inside size of 21.3 x 9.3 x 5.5 in and an outside size of 25.5 x 12.5 x 6.75 in, so tall gear stays out of the low inside height. Leave room for the seat to fold down: GEEDAR warns not to overfill the bag or top pockets, so the seat can still go down.

Garage Fit Check

• Measure under the rear bench before ordering: outside sizes here run from 20.0 x 13.0 x 10.0 in to 12.0 x 49.5 x 5.0 in, and the GEEDAR and MIKKUPPA listings give two different sizes each.
• Check the cab list: all 5 fit Ford F-150 crew cabs, and only the MTM crate also lists 2019-2026 Chevy Silverado and GMC Sierra Crew Cab fit.
• Plan what goes inside: the MTM crate holds 19.2 quarts, the DiffCar box adds a detachable bin and mesh net, and the soft bags fold away when the seat needs to carry passengers.
• Confirm the warranty in writing: only the MTM crate states a term, a 5 year manufacturer warranty with a 10 year warranty on living hinge products, and the other listings give no term.

FAQ: garage tools

Will a behind-the-seat box fit a crew cab?

All 5 boxes here list fit for full-size crew cabs with 4 full-size doors, and all 5 list Ford F-150 fit. Measure the space under the back seat and match it to the listing size, since the GEEDAR and MIKKUPPA listings each give two different sizes.

What is the difference between a hard box and a soft bag?

A hard box holds its shape and wipes clean; the MTM, DiffCar and FengYu picks are molded or hard plastic. A soft bag folds away when not in use; the GEEDAR box folds flat and the MIKKUPPA bag folds with a detachable hard board.

Do these boxes need drilling to install?

The FengYu box states no drill or tools are required for installation. The other listings do not state an install method, so check the listing before ordering.

Can a behind-the-seat box fold away when the seat is needed?

The GEEDAR box folds away when not in use, and the MIKKUPPA bag folds with its hard board removed. The hard boxes do not state that they fold, so plan on them staying under the bench.

Related: the tool storage hub and the best garage storage cabinets for basement.