We can fabricate any size Kelly box adapter.*If female Kelly Box is greater than male adapter and exceeds the torque rating, failure may occur. Jeffrey Machine will not be held responsible for failure due to over torque. Jeffrey Machine reserves the right to inspect if failure occurs...
*All Jeffrey Machine Inc. standard shim boxes are fabricated and CNC machined to fit our Jeffrey Machine Inc. drive box. And are not guaranteed to fit another manufacturer's drive box. Let us know if you need a custom fabricated shim box to fit a different manufacturer's drive box.9..