There is no shoulder strap. The key is included. I haven't carried it around much, but there are some scratches from storage. Therefore, I'm listing it as "no noticeable scratches or stains." I hope you understand. A luxurious black leather trumpet case with a key for excellent security. - Brand: Bach - Color: Black - Material: Leather - Hardware: Gold - Locking Mechanism: Key - Design: Simple and luxurious design Thank you for looking.