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Songhurst "The Rock Slide" Medium Moulded Glass Slide



Inventing The Rock Slide guitar slide; A Brief History
Author: Mark Morse, Founder/Inventor

"While playing the club circuit in the late seventies, I was always less than satisfied with the guitar slides available at music stores. It always bugged me how slides would pinch the inside of my 2nd knuckle. While home on a break I decided to grind out the cutaway section of a chrome slide I had at the time. It immediately made a big difference in the comfort & stability. This got me thinking some years later that the concept could be taken much further.While the cutaway was convenient the interior was still “pipe like”. My research led me to a creative metal manufacturing company in Spokane, Washington that utilized computer driven Swiss screw machine technology. I decided to utilize CNC and CAD drawings to take my project to the next level. Once the design was finalized and patented, we loaded our design into the computers and The Rock Slide was born. 

This type of manufacturing is common in the automotive and aerospace industries and produces consistent, identical slides. We have now sold over 55,000 slides and the feedback from players is always great."

Moulded Glass Rock Slides are individually hand moulded by master lampworkers.  These have all the same features as our brass Rock Slide® with the Knuckle Cut, Finger Rest and Tapered Interior.  These fit almost exactly like their brass counterpart but are slightly longer.  The main difference being that they are much lighter & faster so you can really cook with these on an electric guitar.  Because of our unique tapered interior design they do have enough mass to light up your acoustic.

The Moulded Glass Rock Slide also has very thick walls because of the internal taper, in fact, the walls at the opening are 4mm and 6-8mm thick at the fingertip end. That’s about twice the thickness of a typical heavy wall glass slide at the end. A baseball bat has a sweet spot for hitting a home run, The Rock Slide® has a sweet spot too. While it is thick enough everywhere to light up the strings, the extra thick end almost acts as a gain knob which helps bring out the low notes, and makes for killer lead playing.


MEDIUM ROCK SLIDES are a perfect weight for most styles, heavy enough for long sustain on acoustic guitars, but light enough to easily control for fast electric playing.

Size: Medium
SKU: GRS-MC
I.D. mm: 19.5
Length mm: 60
Weight g: 48