Easy to install: guitar protector block is easy to install with no tools needed, and it is made of silicone material, soft and lightweight, good to protect your guitarLarge quantity: there are 12 pieces guitar strap locks in classic black color, convenient and easy for you to replace your old or original strap locksReliable and hassle-free: no mechanical tools are needed to break or wear out, this rubber guitar strap block surely can save your time and energy, it is a must guitar accessory for most guitar loversStandard size: guitar protector locks are suitable for most strap buttons, no drilling, no screwing and no need to replace existing strap buttons on your guitar, just slip over the existing strap buttons, and strap locked securely in placeGood match with your guitar: simple style but sturdy material, durable and low profile, noise-free, this guitar locks block fits snugly and grab your strap ends without binding or clattering