The Moulded Glass Rock Slide is designed and carefully crafted with your needs as a player taken into careful consideration. The Rock Slide is simply unmatched in comfort, thanks to the design's contoured finger rest and knuckle cutaway. And the slide's tapered interior ensures a uniform fit along your whole finger, adding stability and control to your slide performances. And the slide's moulded glass material is legendary for its slick feel and light weight, making high-speed passages that much easier. Glass has long been a favorite guitar slide material. It imparts your tone with additional warmth for a fatter sound. And its extremely smooth surface area feels slick and effortless when traveling across the strings. Place a Rock Slide on your finger, and you'll know why the company makes sure you know it's "Not just a piece of pipe!" Rock Slides are quickly gaining in popularity with players thanks to some carefully considered features. The interior of the slide is tapered throughout, giving your finger the same controlled fit at your fingertip as you have at the base of your knuckle. The finger rest contoured into the side of the slide is surprisingly ergonomic. And the Rock Slide Moulded Glass slide's knuckle cutaway keeps the slide positioned correctly on your finger at all times.