A practical, reliable cassette reel with a stunning aesthetic design. This reel includes the Hardy Line ID system - use the moveable, reusable pins to mark the line type. Neater than marker pen, more reliable than stickers, and best of all can be changed when you change your line. CLS stands for Cassette Locking System. This Hardy-designed feature instantly locks/unlocks the spool into place at the flick of a switch, meaning the spool is held securely, but easy to remove. It also reduces the stress placed upon working parts within the system to a minimum.