Rocktile bottlenecks provide the basis for slide guitar playing which is especially popular in Blues music. The pioneer of the bottlenecks was Charlie Patton who in fact used the broken neck of a glass bottle.
Those days are now over. With the Rocktile slides you get a pair (2 pieces) of slides at an unbeatable price.
The Rocktile glass bottlenecks create a warm and soft sound with little noise and they are also particularly suitable for open tunings.