History of Development & Innovation
SICgrip Firsts
lightweight training grips made with aluminum
user replaceable and variable friction grip surface 
logarithmic spiral grip shape featuring a variable radii sloper surface that changes difficulty by rotating the grip
4-point grip suspension to stabilize a portable hanging grip
ability to vary grip angle (X, Y, and Z axis) for comfort and degree of difficulty (3D-Sling; and 3D-Slider)
elliptical crimper that changes surface contact area making it harder or easier as it rotates and changes angle
RipCord Quick Release: a simple system for easily releasing and adjusting grip angle and position without having to take grip down from anchor (Gstring PROs)
crimper whose depth can be precisely controlled through using shims (ShimCrimp - Pocket Rocks)
portable training grips that are small enough to fit in your pocket (Pocket Rocks) and allow training virtually anywhere they can be hung
Magic Pocket: a multi-use negative space (tunnel through the grip) which yields different grip positions and features depending upon its orientation (Pocket Rocks)
The use of finger “dimples” (indentations) to easily position hand by placing middle fingertip into a small depression. This allows one to easily and consistently place hand back to the same position on a sloper. It also allows a larger flat edge surface to be used for multiple edge depths (Pocket Rocks)
Gstring Climbing Grips
We’ve been experimenting with ideas based on a logarithmic spiral shaped grip and a four point adjustable sling arrangement since the mid-90s. The goal has always been a versatile training product for climbers that offers as many grip positions as possible, but in a small form factor. A couple different ideas/versions were even shopped around to several well-known companies but never resulted in a commercial product for climbers. Here’s some of that process shown through photos, though not necessarily in chronological order.


Final prototype
After finalizing the adjustable four-point sling and significant testing of the last prototype above, we felt like we were close enough to what we envisioned for a marketable product that we decided to go ahead with a final pre-production version using the target material - aluminum. By moving to aluminum we were able to create the exact size and shape since there were no material constraints like there were with some of the other materials. A final modification included the elliptical crimper which can be changed from easy to hard just by its orientation. 
Two climbing friends, Brian and Alex, provided the expertise we needed to create the aluminum prototype. Brian is a mechanical engineer who took my notes and rough computer drawings and put them into SolidWorks CAD software and turned it into a virtual model. He used the virtual model for testing to make sure the Gstrings would be strong enough to endure the actual stresses that it might be subject to during use. This was followed by actual physical tests, to confirm the CAD modeling. 
Alex, a machinist and consultant in relation to all things metal, took Brian’s Sold Works specifications and input them into an EDM (Electrical Discharge Machining) to cut the actual prototype. The prototypes were cut from a 40 lb. solid block of 6061-T6 aluminum! Here are some photos from that process and the end result. The EDM machine is an incredible piece of equipment!
Production version
After stress tests and and several months of user feedback, we made final adjustments to the SolidWorks specs. This included thinning non-critical structural walls to reduce weight and over-all size slightly, and adding an ergonomic curve to the flat edge for more comfort while also making it more joint and tendon friendly. We then sent the specs to a extrusion manufacturer to machine a die and extrude 8’ lengths of the “G” tubing to be used in the production of the end product. Lastly, various jigs were created to make chopping, slicing, drilling, and various aspects of assembly more accurate and efficient.
It’s been a long but rewarding process to see this project through from a felt need, to an idea, a design, various prototypes, and finally into small scale production.
We're now in the process of applying for a patent on both spiral grips and the 4-point adjustable suspension in various forms, which have wider application than this specific product. Look for new offerings in the future!

Pocket Rocks
Our second product was developed using some of the ideas and designs proven through the Gstrings. However, we wanted a design that could be: more portable; would be easier to mass produce (more reasonably priced); and offers a few new features (ShimCrimp and 1/2/3 finger pocket). They will replace the Gstring Classics. Gstring PROs will continue to be available and while there’s some overlap between the two products, they each have unique features and applications. Pocket Rocks will offer the same unique 3D adjustability for comfort and angle exemplified by both models of Gstrings. However, the new 3D-Slider system is an improvement over Gstring Classics. Grip angle/orientation is changed by simply sliding the cord through one side of the grip. Grip position is held in place by the weight of the user.

< Original Pocket Rock prototype with with the adjustment system of the Gstring Classics. Notice the optional shims to be used to reduce the crimper size in gradual increments as user progress in strength.
> Final production prototype: solid Beech wood with the new simple 3D-Slider adjustment.

A few examples of the more than 10 prototypes developed to explore different sizes, shapes and materials and processes. From left to right: hand made laminated Poplar wood; foam master for making silicone mold for urethane; urethane grip; CAD machined rubberwood in two-halves then glued together; CAD machined solid Beech. Each prototype is tested for several months to determine what’s good and what needs to be changed. In the end, with a grip this size, everything tends to be a compromise. However, we feel confident that we have the equivalent functionality of some of the best hangboards on the market, PLUS it’s portable and and will be more reasonably priced! See our rationale for using wood instead of urethane here.

                 printout of CAD file from SolidWorks                               Pocket Rocks product/business card