This slide presents the patented solution to an old problem. How do I combine slide playing with standard finger technique? The ring of the slide fits securely on the finger, while the slide section can be easily rotated into the desired position with the thumb. This way, the slide finger can become a gripping finger again while playing! The package includes four finger rings with inner diameters of 17 mm, 19 mm, 20.5 mm, and 22 mm.