OX Trade Tooltrek 3-piece modular units comprise 3 sizes of Tooltrek boxes to create a platform for all your tool storage and transport needs. Built from an impact-resistant PP body and with an IP65 Rating it's designed to withstand tough jobsite conditions. Its patented auto-locking system makes it very easy to disconnect and connect the boxes together. It integrates with OX Pro Heavy Duty Organisers and has side accessory attachment holes making it very versatile.