Limit of 2 per customer

This item is not currently available.


Historically, Yoroi Toshi were one of the Japanese swords favored by the samurai class for their ability to pierce through armor. The Mummert TSK YT has a Yoroi Toshi style blade which is thicker at the spine for added strength. A longer trailing point lengthens the usable edge and improves its effectiveness at slicing and other fine chores. This combination of strength and finesse makes it the perfect complement to your robust field knife. A black laser finish, striking in both appearance and function, work hardens the titanium making it incredibly durable and scratch resistant. The updated Kydex sheath features Mummert’s own titanium clip, lasered black to match the knife with our signature topo pattern.

Lightweight and slender, the TSK YT’s titanium and carbide construction requires minimal maintenance. This edition features a more pronounced guard to ensure a secure grip and easier handling.

  • The primary edge is a proper chisel hollow grind with the convex chisel ground tip for added piercing strength.

  • Carbidized edge.

  • Laser applied black finish on the knife and clip provide hardness well above the titanium alone.

  • An ergonomic minimalist grip with finger grooves, wrapped in paracord. As an extra detail, Marc added notches to for the 550 paracord to sit on.

  • A Kydex belt sheath with with Mummert’s own fold over titanium clip.

Marc Mummert has been a knife collector since his youth. He has been making knives for 15 years and transitioned to making custom knives full time in 2011. With a belief that every good knife is an extension of your hand, Marc spends a lot of time designing and crafting just the right handle ergonomics. Due to his proximity near the ocean, he specializes in blade materials that are corrosion resistant and durable in harsh environments.

Limit of 2 per customer.

Due to the nature of custom items, slight variations may occur.

By placing an order with Triple Aught Design, you are verifying that you are over 18 years of age and are aware of all local, state and federal laws regarding the possession of, or the carrying of this product. Triple Aught Design shall be held blameless for any infraction of laws made by the purchaser.



Blade: 6AL-4V Titanium

Wrap: Black 550 Paracord


Overall Length: 8.375” (21.273 cm)

Blade Length: 3.875” (9.843 cm)

Cutting Edge: 3.75” (9.53 cm)

Blade Thickness: 0.188” (0.476 cm)

Handle Length: 4.5” (11.43 cm)

Handle Thickness: 0.435” (1.10 cm)


Without Sheath: 1.8 oz (51.2 grams)

With Sheath: 3.63 oz (102.8 grams)


Blade Type: Hollow Chisel Yori Toshi

Carbidized Edge

Belt Sheath with Titanium Clip

Groove for Paracord Wrap

Logos & Labels

Laser Etched Mummert and TAD Logos on Handle. Laser Etched Topo Pattern On Clip

Made in USA