Features: Strap Blocks Rubber Sufficient Quantity: 10 pieces guitar strap locks in four canonical color, guitar locking strap locks let you easy to replacement of your old or original strap locks. Reliable Material: Guitar strap locks made of quality PE material, stretch, light and soft, durable and resistant to breakage or wear, no screwing, and it will protect your guitar better. Easy to Install: Guitar protector block is easy to install, no need to replace existing strap buttons on your guitar, just slip over the existing strap buttons, and strap locked securely in place. Standard Size: Guitar protections lock has an outer diameter of 25mm and an inner diameter of 10mm and will fit most strap buttons. Suitable for all kinds of acoustic guitars, electric guitars. Perfect for Your Guitar: Simple but sturdy, durable and noiseless, this guitar latches snugly fits and grip the end of your strap without binding. An must guitar accessory for guitar lovers. Specifications: Material: PE Color: Red/Green/Black/Blue Package Weight: approx.15g Inner Diameter: approx.25mm/0.98in Outer Diameter: approx.10mm/0.39in (More Size Detail, Please See Photo.) Package Includes: 10Pcs x Guitar Strap Locks Blocks note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks!