D'Addario Flex Lock Strap Blocks are a hassle-free strap locking system designed for players who don't want to modify their existing end pins. Simply slip the Flex Lock Strap Blocks over your existing strap buttons and you�re ready to go. Made of flexible, durable rubber to ensure a secure connection, Flex Lock Strap Blocks fit most manufacturer end pins on the market and are available in black or red 4-packs. Inspired by the classic Grolsch bottle cap strap lock solution.
 
UPC: 019954392406