Sid Savers were created to provide Sid Collectors with a safer way to display their Memory Blocks. These small blocks of wood come to you ready to hang. If you are installing the Sid Saver into drywall, using a drill-driver, there is no need to pre-drill holes. The screws will self thread into the wallboard. The screws will also accept both Phillips Head Drivers and #2 Square-Head Drivers (square-head works best). Sid Dickens Memory Blocks are sold separately.