The Merchant & Mills Costermonger Hardware Kit is designed to turn a simple sewing project into a premium piece of luggage!
The Costermonger – a clever hybrid between a tote and a backpack – relies on high-quality leather and metal components for its unique functionality and rugged charm. This kit provides the specific “ingredients” required to finish the bag to a professional standard.
Kit includes:
2 x split cowhide leather straps.
4 x 1″ sliders.
8 x 9mm nickel rivets.
It includes two pre-cut, high-quality leather straps and the necessary rivets for secure attachment. By using pre-cut leather, you save time and ensure a clean, uniform finish that is difficult to achieve by hand-cutting. The leather is selected for its strength and ability to age beautifully, softening and darkening with use. The rivets provided are heavy-duty, ensuring the straps remain firmly in place even when the bag is used for heavy grocery hauls or daily essentials. Sourcing these specific materials individually can be difficult, but this kit ensures perfect compatibility with the Costermonger pattern instructions.
This kit is the ideal choice for makers who want to elevate their sewing projects with the authentic texture of leather and the reliability of metal hardware. Create a bag that is both a workhorse and a statement piece!
This kit includes the nickel hardware and leather for our Costermonger pattern. It does not include the pattern or fabric.



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