
Metric size bits of 11mm’s are also commonly used. The most common drill bit sizes used for tailpiece stud insert holes are 27/64ths and 7/16ths, each builder has a favorite size & method they typically use. TonePros cannot be held responsible in any way for errors and/or workmanship issues in the installation of any product.
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IMPORTANT: TonePros accepts no responsibility for drill bit choices and/or installation methods and ALWAYS recommends using a professional who is skilled in this procedure for installation. Tailpiece or Locking Stud Insert Hole Size That’s it!! You are done, and it is set and will stay that way, strings or no strings!! Better contact, better transfer, better coupling, enjoy! Once your “action” is adjusted to where you like it, go ahead and tighten the allen screws on each side bridge post (as always, careful not to over tighten) locking them in place.


Now restring your guitar as normal and adjust bridge height as in the past. If the new bridge doesn’t just drop right on at first, simply dial up your posts and either gently pinch or separate your posts until the new bridge is on and seats properly, then dial your posts back down to where you had them. If your holes are just a little off, don’t panic, your bridge will fit! And don’t worry, because a tight fit is good! This helps to guide your bridge posts if the holes are “just a little off”. This is called a funnel or cone shaped hole. You may not have noticed, but on many bridges the bottom of the hole is bigger than the top of the hole.

The first thing to remember is that even though every company uses the exact same specifications and we can “fly to the moon”, guitar manufacturers still can’t always get their bridge post holes drilled in exactly the same, right places.
