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The Master Kuo GL340 Long Taiwan Tuna Knife is a big fish knife with a long, straight blade that is 340mm, or 13″ long and 80mm or 3″ high. It is used to make long lateral cuts as well as cross sectioning cuts on large fish like Tuna, Mahi, Swordfish, Grouper, or for clearing the height of your BBQ pork belly or brisket. A custom made leather sheath is included.

Traditionally, the GL series knives have been used in conjunction with the Master Kuo G series Taiwan Tuna Knives to make long lateral cuts, and/or cross cuts across the spine. It is kin to a Japanese maguro bocho.


  • Blade: 340 x 80 x 3 mm / 13.25″ x 3.1″ x 0.125″
  • Handle Length: 110 mm / 4.25″
  • Overall Length: 460 mm / 18″
  • Weight: 540 g. / 19 oz. (1.2 lbs.)

Knife care: Keep clean with warm water and soap. Towel dry immediately. Do not put into dishwasher. Stainless clad outer steel will not rust, but exposed SK5 core edge steel can show signs of surface rust over time. Most surface rust can be removed by sharpening the edge.

Weight 1.6 lbs
Dimensions 22 × 6 × 6 in

Master Kuo


Master Kuo GL Series

1 review for Master Kuo GL340 Tuna Knife & BBQ Brisket Knife With Sheath

  1. Wiley

    What can you say to a well made knife. An excellent form and use. Thank you

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Shipping to USA

Most Domestic USA orders ship within 72 hours of ordering from our Colorado location via USPS. You can track your order from this Link

Shipping International/ outside of USA

Most International orders ship within 72 hours of ordering from our Taiwan location via Chunghwa Post. You can track your order from your countrys postal website or from this Link

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