Bam Bam Neoprene Case Strap with Carabiner Hook Long Size Color: Black 9002NLBAM Logo Case Strap The locking carabiner hook helps prevent the hook from falling off The neoprene material prevents it from slipping off the shoulder and reduces stress when carrying. Standard size for larger cases like cello and bariton saxophone Sold as a single piece. For backpack style, please prepare 2 pieces BAM NEOPRANE LONG STRAP CARABINER HOOK.