In 1999, Songhurst Guitars invented the first ergonomic slide which has been favored by professional acoustic and electric players ever since. The signature is our tapered interior design, which fits like a glove. Other features include the knuckle cutaway for finger flexibility and the dished finger rest for perfect control and vibrato. Polished brass offers the smoothness of chrome with the thick tone of brass. Small Rock Slides® are the sports car of the slide world, very light weight and extremely fast. Ideal for the guitarist who needs to play chords but wants to throw in pinky slide chops. It also works well on the ring finger of many women. Inside Diameter: 17.5mm Total Length: 47.5mm Weight: 45g USA Ring size: 6-7