The basic Sharkoon PC Screw Kit S (Screwdriver) contains a precision screwdriver and a collection of the most commonly used PC screws: 6mm fine thread screws for floppy and optical drives, long 6mm and short 3mm coarse thread screws for hard drives and add-on cards as well as mounting screws for case fans.
The Sharkoon PC Screw Kit CR (Cable management and Rubber parts) offers a more extensive selection of accessories: in addition to the same collection of screws as in the basic set, the CR kit also contains round-headed mounting screws with 6mm coarse threading for hard drives and add-on cards, cable ties, jumpers (2.54 mm), as well as paperboard washers and metal spacers for mounting mainboards. The Sharkoon Screw Kit CR does not include a screwdriver.
The max-edition, the Sharkoon PC Screw Kit SRA (Screwdriver, Rubber parts & Accessories), contains all of the parts included in the Screw Kit S as well as metal spacers for mounting mainboards, jumpers (2.54 mm), self-adhesive rubber case feet, rubber plugs for installing fans and a set of knurled screws.