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45/AC-TOOL27

Martin Guitars String Height Action Gauge

The Martin Guitars String Height Action Gauge is a precise, practical tool for players and luthiers who want consistency in their setups. Designed by one of the most trusted names in acoustic instruments, it helps you dial in ideal string action for better comfort, tone, and playability.

With both standard and metric markings, the gauge works with virtually any stringed instrument, including acoustic and electric guitars, basses, mandolins, and ukuleles. It's ideal for a first setup or fine-tuning a professional rig, giving the clarity and accuracy needed to nail perfect string height at the 12th fret and beyond.

Features

  • Dual-unit gauge measures in both standard and metric units.
  • Suits guitars, basses, mandolins, ukuleles, and other fretted instruments.
  • Precision markings allow quick reference for accurate setup work.
  • Helps achieve clean, buzz-free low action at the 12th fret.
  • Trusted by luthiers and guitar techs for reliable, repeatable measurements.

Specs

  • Measurement units: Standard and metric
  • Material: Metal
  • Application: String height/action measurement
  • Suitable for: Guitars, basses, mandolins, ukuleles, and other fretted instruments
  • Recommended use: 12th fret action adjustment

Instruments & Amps

  • Free courier shipping on orders over $1499 to eligible metro areas

  • $49–$69 standard shipping on lower-value orders

  • Express shipping available for an additional fee

  • Regional and remote areas may incur higher freight costs

Accessories

  • Free standard shipping on orders over $99

  • Flat $8.99 shipping under $99

  • $15 express shipping available

Delivery Details

  • All orders ship with tracking

  • Instruments and large items require signature on delivery

  • If freight costs exceed expectations, we’ll contact you before shipping

Shipping rates, eligibility, and delivery options are confirmed at checkout based on your location.

Ways To Pay

Buy Now, Pay Later

  • Zip – 3 months interest-free under $1,000, 6 months interest-free over $1,000

  • Afterpay – available at checkout

Pay in Full

  • Credit & Debit Card

  • PayPal

  • Bank Transfer

Rent to Own

  • Studio19 Rentals – low monthly payments with the option to buy later

All prices are in AUD and include GST. Payment options are shown at checkout.

Returns

  • If something’s not right, please contact us first and we’ll help you work through the best solution

  • Returns, exchanges, repairs, or credits are available for faulty or misdescribed items

  • Return requests should be made within 7 days of delivery

  • Freight charges aren’t refundable

  • Non-faulty returns may incur return shipping and a small restocking fee

  • Opened consumables (including strings and picks) can’t be returned

Returns are assessed case-by-case so we can ensure the fairest outcome for everyone.