I have a mac tools tool box and needed some extra room for my folders and blow moulded boxes etc. After contacting my mac tools dealer I decided I would save myself £3000 buying two mac tools side lockers and bought myself two of the sealey side lockers from here. The lockers are great and for a sealey tool box they would be just bolt on, for me because I was fitting them to much larger mac tools tool box I had to modify a few things, I removed the hook system (just 4 screws and nuts) and bolted it directly to the side of my tool box. The lockers now sit flush with the tool box with a small gap between the hutch and lockers. The colour isnt an exact match either but again for £3000 less for the two lockers than a mac tools ones I'm happy with it. Customer service was great, usually within 24 hours response to emails, great prices, items packaged very well and very quick delivery. Thanks will recommend.