[Durable Metal Construction] Ensures long-lasting reliability for secure strap attachment. [Compatibility] Compatible with Schaller and compatible with Grover strap lock systems. [Convenient Installation] Includes mounting screws for easy attachment to your strap. [Optimal Size] Dimensions of 11.9x9.9mm ensure a perfect fit without adding bulk. [Value Pack] You'll receive 2 pairs of guitar strap buttons, providing you with enough buttons for backups. Material Metal Size 11.9x9.9mm Compatibility For Schaller and for Grover strap lock systems Colour silver Type Strap Button Brand Unbranded/Generic MPN MEM94670998479 EAN 4894670998479 .