Grover is known for making the world's finest machine heads.  Includes all mounting hardware. 

The 106 Series are innovations in engineering and design. These locking machine heads give you the ease of use provided by a Rotomatic® style machine head and the positive locking of Grover's internal cam post. Simply insert the string through the string hole, pull to tension by hand and begin tuning. As you start to tune, only the locking cam in the string post turns. Once the string is locked, the string post begins to turn allowing you to bring the string to pitch. In less then one revolution of the string post, you will be in tune and stay in tune.

Features:

• Sealed-in, lubricated gears
• 18:1 gear ratio
• 25/64” (9.93mm/.391 inches) post hole
• Post length to hole: 24.9mm
• Overall post length: 32.5mm
• Weight per pc/per set: 1.6oz/9.6oz
• Max. string gauge: .054”
• Grover Lifetime Guarantee
• For 3-left/3-right solid pegheads