Description: Material: Solid Brass. The classic lobster claw snap hook with spring-close gate for extra security. Extremely durable thanks to its material, never worry about your items falling apart. These are molded and casted,no seams in the middle.Strong and clean. Multi-Purpose: These lobster clasp clips can be used in various applications, sports equipment, pet products, make some homemade keychains, lanyards and more! Use daily to separate your work keys. Specification: Size: Approx. (1) 12mm: Inner width: 12mm/0.47inch, overall Length: 61mm/2.4inch. (Arabesque) (2) 20mm: Inner width: 20mm/0.79inch, overall Length: 53mm/2.09inch. (Arabesque) (3) 20mm: 20mm/0.79inch, overall Length: 53mm/2.09inch. (4) 11mm: 11mm/0.43inch, overall Length: 49mm/1.93inch. (5) 10mm: 10mm/0.39inch, overall Length: 35mm/1.38inch. Package Includes: 1 Piece Lobster Clasps Note: Due to manual measurement, there may be 1-3mm error in size.