Ferrer Men's Metal-free Belt Replacement Buckles Metal-free. These buckles will pass through the most sensitive metal detectors without beeping. Each order comes with 2 buckles. Ideal for people with metal allergies. Interchangeable with any Ferrer Men's Leather Metal-free Belts. (Outer Dimensions: 1 7/8" x 2 3/8") (Inner Dimensions: 1 3/8" x 1 11/16") Compatible buckle replacement for any Ferrer Men's Leather Metal-free Belts.