The Edge Pocketknife Slide
They'd hold them between the ring finger and the pinky of the left hand. With this style, it was possible to barre straight across the strings or play individual notes on different strings and then swing the knife--or razor--out of the way when it was not needed.
Fingerstyle iconoclast, John Pearse decided to go back to the knife and he created The Edge. Pearse created a slide that was sculpted in such a way that it would fit effortlessly between the ring finger and the pinky. He designed so carefully that it has a counterbalance that allows it to be swung out of the way when it is not needed. Finally, he cast it from dense bell brass to give it incredible sustain.
Shipping: US - $4.00 Worldwide - $9.50