Slower spool oscillation reduces the speed the line travels up and down the spool on the cast. This results in less friction as line leaves the spool and reduced drag on the lead, which improves casting distance and accuracy.
SHIMANO STANDARD Oscillation (up to 20 wraps per cycle) outperforms the industry standard. SHIMANO SLOW OSCILLATING (up to 40 wraps per cycle) exceeds almost anything else ever seen. Shimano now has two SUPER SLOW OSCILLATION systems - SUPER SLOW 5 (55 wraps) and SUPER SLOW 10 (105 wraps).