I have the same chuck for my Rikon70-100. It has been a good chuck. Holds well and I like the key it uses to tighten the jaws versus the two bars. I just ordered a set of nova pin jaws and they work perfectly on the chuck. The nova jaws will work with this chuck. This chuck differs slightly from the G3 that with the insertion of the set of screws, it can be run in reverse on a lathe like the variable speed delta. I never use that feature but the chuck is worth it. Basically you stole it! I've used the worm screw and you can remove the jaws and use the small sliding jaws to hold small square or round peices up to one inch. Also the jaws That are included have serrated jaws to hold and not smooth like the G3. Good find