D'Addario Flex Lock Strap Blocks for Guitar - 4 Pack (Black)

Flex Lock Strap Blocks - Secure your strap without drilling or replacing parts

Flex Lock Strap Blocks provide a hassle-free way to lock your guitar or bass strap in place: you simply slip the rubber blocks over your existing strap buttons — no modifications or additional hardware required. Because they grip most standard end-pins, they offer a quick and reversible way to prevent accidental strap detachment, ideal for live playing, rehearsals, or heavy gigging. 

Durable, flexible and stage-ready

Made from flexible, durable rubber, the blocks are designed to withstand stage movement, frequent attaching/removing, and transport without damaging your instrument’s finish or hardware. Their low-profile design helps keep the guitar’s look intact while providing reliable strap security. 

Universal compatibility and simplicity

The Flex Lock blocks are compatible with the vast majority of standard guitar and bass strap-buttons from major manufacturers. Because they don’t require permanent installation, you can keep a set ready and use them across multiple instruments — useful if you own more than one guitar or bass, or lend gear to other musicians. 

KEY FEATURES: D'Addario Flex Lock Strap Blocks for Guitar - 4 Pack (Black)

• Simple installation – Just slip the block over your existing strap button; no screws or alterations
• Durable rubber construction – Designed to endure frequent use, transport, and stage conditions
• Broad compatibility – Works with most standard end-pins used by guitar and bass manufacturers
• Removable and reusable – Easily removed when you want to swap straps or give them to another instrument
• Cost-effective safety – Affordable but effective way to prevent strap-slips or drops, especially when playing standing up or moving around