EDM 3R System Electrode Holder Machinist Tools moldmaking grinding fixture

Description

I am putting up for sale several EDM tool/electrode holders. I purchased or made these holders a long time ago. I used them only a few times for work. Many years ago I switched from using the 3R System to the EROWA System. I placed the fixtures into shelf storage after covering them with corrosion protection in case I needed to use them again. The need to use them again did not arise. I see no need for them in the future either. I have decided to sell them. P
lease see my other listings for similar items.
EDM 3R System Electrode Holder with Back Rail
I made it from A-2 Tool Steel. Drilled approx. 5/8 deep and topped 1/4 - 20 screw holes. Double draw heat treated to 58-60 RC. I checked all the holes to ensure that you can screw in the screw in each hole by hand. Precisely grounded within one or two tenths to center line. The flatness, parallelism, and squareness is within one or two tenths. On top of the fixture is a stamped tool steel and my initials.
Size of block: 2.520 X 2.520 X 3.020
Back Rail Size: 3.020 X 1.500 X .310
The item was very lightly used. Please see pictures. Feel free to ask me any other questions.