Another solution to attaching a guitar strap to your acoustic without installing a button is a complex locking system by Planet Lock. Planet Lock’s strap is universal, which means it will fit any guitar out there – regardless of whether it is acoustic or electric. It is very easy to use and simply locks itself in the strap and then you can decide when to let go of the pin. Just two easy steps and voila! You’re acoustic guitar strap is now attached firmly to your guitar.