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The Master Kuo GL300 Long Taiwan Tuna Knife is a big fish knife with a long, straight blade that is 300mm, or 12″ long and 8omm 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, etc. As a BBQ Knife, it is an oversized chef knife that can make long, singular cuts into big brisket and ribs.

The GL-300 is almost always accompanied by a G-5 XLG-5 2XL or G-5 3XL. It is kin to a Japanese maguro bocho. This blade is stainless steel cladding with a Japanese Carbon steel core, and a stainless steel handle. Hardness is RC 60-61. It is also available in 340mm (13″), and 360mm (14″), and 500mm (20″).


  • Blade: 300 x 80 x 2.5 mm / 12″ x 3.1″ x 0.10″
  • Handle Length: 110 mm / 4.25″
  • Overall Length: 420 mm / 16.5″
  • Weight: 510 g. / 18 oz. (1.1 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 19.5 × 6 × 6 in

Master Kuo


Master Kuo GL Series

1 review for Master Kuo GL300 Taiwan Tuna Knife & BBQ Knife With Sheath

  1. Eric

    It’s a substantial, stunning knife that effortlessly glides through tuna. Its size and sharpness make filleting a breeze, and I couldn’t be happier with its performance.

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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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