Product overview Small rubber locking blocks designed to keep guitar straps secure and protect instrument finish. Each set includes 20 black anti release pieces sized 25 x 2.5 mm for universal compatibility with most straps and strap buttons. Key benefits Prevents accidental strap release: Adds friction and a locking surface between strap and button to reduce slips during playing and movement. Protects instrument and strap: Soft non slip rubber cushions contact points to prevent wear on strap ends and scratches on the guitar finish. Ready spares for multiple instruments: 20 pieces allow use on several guitars or provide replacements for touring, practice, and home use. Easy to use: Simple installation and removal with no tools required. Product highlights Quantity: 20 pieces per pack for broad coverage and spare parts. Size: 25 x 2.5 mm each, compact and low profile so they do not interfere with strap fit. Material: Durable black non slip rubber that grips without damaging straps or buttons. Function: Anti release locking buckles provide added security for strap attachment while remaining flexible for normal strap movement. Compatibility: Designed as a universal strap block compatible with most guitar straps and strap buttons on acoustic, electric, and bass guitars. How it solves common problems Stops sudden drops during performance by increasing traction at the strap attachment point. Reduces ongoing wear to leather or nylon strap ends caused by repeated movement. Keeps vintage or delicate finishes safer by inserting a soft barrier between metal button and strap material. Simple installation Slide or place the rubber block into the strap hole or between the strap and button depending on strap design. Attach the strap to the button as usual. Adjust position for the fit and grip. Remove easily for cleaning or replacement. Use scenarios Live performance: Install on stage guitars to prevent strap slips when moving, dancing, or switching instruments quickly. Travel and storage: Keep blocks in cases for safer transport and to protect strap ends from rubbing against hardware. Multi instrument setups: Fit several guitars in a studio so each has its own protector, avoiding constant transfer of a single strap and reducing wear. What you get Pack of 20 black non slip rubber strap blocks, each 25 x 2.5 mm, suitable for routine use and spare parts. Why choose these strap blocks They provide a simple, low profile way to increase strap security and protect both instrument and strap without modifying hardware. The pack size and compact dimensions make them practical for gigging musicians, hobbyists, and technicians who need reliable, replaceable parts.