Using your D’Addario Auto Lock Guitar Strap is a breeze. Just find the strap buttons on your guitar. The spring - loaded latch on the strap will automatically clamp down when you press it onto the button. It won't come off until you deliberately release it. When adjusting the length, simply pull the strap through the buckle to get your desired fit between 35' and 59.5'. As for maintenance, keep it away from sharp objects to avoid cuts. You can clean it with a soft, damp cloth. Also, don't expose it to extreme heat or cold, as this could damage the material. Enjoy your new guitar strap and rock on!