Welcome to the World of Jani 1541 Diagnostic Cartridge for the Commodore 64.
 
You get a host of utilities in one awesome cart:
- Alignment Check
- View BAM
- Disk Command
- Directory
- Error Scan
- Fast Format
- Head Exerciser
- Send IO:
- Reverse Knock
- Speed Check
- Performance Test
- Sector View
- Validate Disk
 
Packaged in a glossy printed box with the cartridge and instruction sheet. 
 
- Cartridge case colour may differ.
- Thanks to sharewareplus and worldofjani plus others for a superb product.