Great idea but fell short on execution. The bleed rod handle, which replaces the bleed handle knob, does not have sufficient spline depth to engage the bleed shaft splines and therefore the shank will slip when attempting to close, tighten and/or open the bleed. I even tried tightening the mounting screw but it didn't help. I think the combination of lack of spline depth and plasticity is what makes it fail. I will try to send it back but the refund took too long.