Sperzel Trim-Lok 3+3 Guitar Machines

  • 17 Reviews
  • Write a review
Buy more, save more!
Sperzel Trim-Lok 3+3 Guitar Machines Satin chrome

Satin chrome

Item # 3421
In stock, ready to ship!


3 or more $55.81
Sperzel Trim-Lok 3+3 Guitar Machines Satin black

Satin black

Item # 3421-B
In stock, ready to ship!


3 or more $59.24
Sperzel Trim-Lok 3+3 Guitar Machines Satin gold

Satin gold

Item # 3421-G
In stock, ready to ship!


3 or more $69.05
Scroll to Top

Sperzel Trim-Lok 3+3 Guitar Machines

About This Item

Sperzel's rear thumbscrew locks the string, making these machines ideal for tremolo guitars. For 3-left/3-right pegheads.

Cast gear housings with sealed lubrication. Single pin mount keeps tuner from rotating, no mounting screws needed. Recommended for 9/16" - 11/16" (14.29mm - 17.46mm) thick pegheads.

• 12:1 ratio
• 10mm (13/32") diameter pegholes required
• Removable metal knobs
• Threaded peghead bushings included
• Sets of 6

    • Item #
    • Weight
    • 3421
    • 0.556 lbs. (0.25 kg)
    • 3421-B
    • 0.485 lbs. (0.22 kg)
    • 3421-G
    • 0.484 lbs. (0.22 kg)
    • M3421
    • 0.000 lbs. (0 kg)
    • M3421
    • 0.000 lbs. (0 kg)

Customer Reviews

  • Excellent
  • Good
  • Average
  • Fair
  • Poor
Write a review
  • 4.82 average rating from 17 reviews
Sort by


(Customer's Reviews)

I've installed these on more than a few of my own guitars, love 'em. Def recommend using a drill jig for install.. (marking and drilling freehand for the locating pins can be challenging). I've noticed that besides more accurate, easier tuning, these locking tuners added more sustain and better tone to every guitar i've put them on.



(Customer's Reviews)

Very good quality, nice looking, great job, easy to fix it (not only for Gibson LP). I should prefer a better ratio (at least 16:1) but i thing this is a minor issue. Hope it stays in tune for years (I'll wait some years to give the fifth star:-)) . Stewmac is very reliable and professional in shipping all over the world. Nice job guys!


Almost great, but...

(Customer's Reviews)

I love these tuners with 2 small exceptions:

1) Sometimes large string gauges are hard to get through the hole.
2) This is more important. There is a little bit of play in the worm gear mechanism. The quality is exceptionally good except for this worm gear play. With strings to tension, this is not very noticable, but it doesn't change the fact that it exists.

Showing 3 of 17 Read more reviews >>

StewMac PDF Catalog, page 59 See Sperzel Trim-Lok 3+3 Guitar Machines
on page 59 of our StewMac Catalog PDF

12MB File

View with Adobe Acrobat Reader 4.0 or higher.
Download Adobe Acrobat free from Adobe.