This steel back stop provides reliable support to keep the passenger comfortably in place on the seat. Easy, no-tools, quick-release installation: The backrest locks onto saddlebag mounting posts. For bikes without saddlebags, Quick Release Mounting Spools are required (sold separately). A cushioned Backrest Pad is also required (sold separately). One Low Profile Quick Release Passenger Sissy Bar Provides passengers with enhanced comfort and support with its steel back stop Easy, no-tool, Quick-Release installation For bikes without saddlebags, Quick Release Mounting Spools are required (sold separately). Backrest Pad required (sold separately)