Yuen Kay San Butterfly Swords – D2 Blunt

Original price was: $800.00.Current price is: $599.00.

Yuen Kay San Lineage Wing Chun Butterfly Swords (Sifu’s Series)
(a.k.a. Wing Chun Butterfly Knives, Bart Jarm Do, Bot Jaam Dao, Hudiedao)


Yuen Kay San Lineage Wing Chun Butterfly Swords (Sifu’s Series)
(a.k.a. Wing Chun Butterfly Knives, Bart Jarm Do, Bot Jaam Dao, Hudiedao)

The Yuen Kay San Butterfly Swords are a very limited edition collector’s item (only 3 available to the general public) commissioned by Sifu Alton Miller. They are beautiful and very comfortable 12″ stabbers.

Own a piece of Wing Chun history. These are a duplicate to a Yuen Kay San design cherished by Sifu Alton Miller. The knives are an outstanding combat weight – around 700 grams each (1.54 lbs).

The blades are made of custom knife-maker quality Böhler D-2 tool steel, professionally heat treated to weapons-grade. On the blunt part all edges are 1-2mm. On the sharpened pairs the swage on the spine is sharpened – so be careful if you flip them. These are real weapons, inherently dangerous and should be treated as such at all times.

The handle on these knives is roughly centered on the blade, a location optimal for percussion against armored targets. They can be flipped between a forward and reverse grip but it is not as easy as when the handle is aligned on the spine. These knives have two-in-one full tang handles of black laminated dyed stabilized wood but full (i.e., two-sided) blades.

Series: Sifu Series. The Sifu series are unique designs and/or fine quality weapons.

Sword Type: Two-in-One.
Blade Style: Stabber Blade
Blade Length: Approx 12″ inches (30.48 cm) from tip to D Guard Along Spine.
Blade Steel: Böhler D2 Weapons-Grade Steel
Blade Grind: Compound primary Lenticular Grind and cutting edge Flat Grind.
Blade Sharpness: Blunt Edge and Swage.
Blade Thickness: Approx 4.5 mm before grinds.
Blade Finish: Satin/Matte
Blade Ricasso/Choil: These swords have a Ricasso.
Blade Fuller: No.
Blade Tapers: These swords have profile and distal tapes for improved function and balance.

Tang: Full Tang
D-Guard Metal: AISI 304 Stainless Steel.
Knuckle-Bow: Rounded, minimal extra interior space.

Handle Material: Black Laminated Stabilized Wood (Pakkawood/Dymondwood®-type material).
Handle Angle/Alignment: Straight Handle. Aligned to center.
Handle Shape: Butterfly Stroke Ergonomic Straight Half-Handle
Handle Type: Two-in-One Handles (see pictures) with 3 large pins.
Flipping vs Trapping: Hybrid Flipping/Trapping

Sword Measurements: Approx 17″ inches (43.18 cm).
Sword Weight: Approx 700 grams (1.54 lbs) each. Up to 30 grams variation.
Balance Point: Approx 1 5/8 inches in.

Design: Modell Design, LLC / Alton Miller / Yuen Kay San

Notes: These swords are hand-made. No two swords are perfectly identical. Small variations in the measurements are typical.

Case/Sheath: A 2-in-1 leather sheath is provided for free. Do not store swords in leather sheaths long term because the chemicals in leather can corrode/tarnish metal. We lined the sheath with Nylon to help with this.