Acoustic Mono jack.

Professional quality heavy duty stereo guitar socket in nickel.

Includes washer, gripper washer and two nuts, the screw-on cap doubles as a strap pin.

It also has a metal screw-on sleeve. Socket length: 85mm. Sleeve length: 52mm, Jack Size: 1/4″ (6.35mm)

Drill a 10mm hole to mount the jack from the inside of your acoustic.

It can also be used for adding a female end to your guitar/keyboard lead.