Use with 20 mm leather, or 2 x 10, or 4 x 5mm - you get the idea. Glue this clasp on with the Super New Glue. Plated zinc. Certified lead and nickel free.
Lead-free. Nickel-free. 23mm x 40mm Hole size is approx. 20 x 2.6. Inside diameter (ID) is 20 mm. By the each.