FAMAG Bormax 2.0 Forstner drill bit 16x90mm
Thanks to the centerpoint and the sidecutters an ideal drill bit for chipfree drilling and countersinking for example your cilinder input jack and excellent of course for fast removal of material from your guitar cavities.
These drill bits are equipped with side slides to remove material and reduce any heat built up. This gives them a very long life time and make them a joy to work with.
The 16mm cilinder drill bit has a cutting depth of max 57mm and a hexaganol shaft 8mm. Use in your electrical (column) druill, prefereably at a rate of 2100/minute.