Help, please

[Ken Smith]

Which Knobs are they. The current model we use has Knobs we have used for over 20 years. They use a 1/16th inch size wrench. There is no exact metric size. If you use a metric that 'almost' fits, you will have the same problem you have now, maybe.

There are 2 screws in each knob. Loosen both to take off the knob. These are black rubber knobs with metal inserts. The old BT concentric smaller Treble knob has a smaller screw, the same as the bridge saddles .050"/inch. NO Metric substitute, only inch size will work or you will strip the slot.