Finger Joint Lock Flow Training | Core JKD Method
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Grip Finger Lock·corejkd
Ming shows how Core JKD trains a flow designed to ingrain finger joint locks and projections without seeing the wrist or…
Grip Finger Lock
Group指関節技(Yubi Kansetsu Waza)
TraditionalTranslation: Finger Joint Techniques
Overview
Grip and finger locks are submission techniques that target the small joints of the hand — the fingers and thumb — by hyperextending, hyperflexing, or twisting individual digits or groups of digits beyond their anatomical range. [7] These techniques exploit the relatively low structural strength of the finger joints compared to larger joints, making them effective but also prone to causing sudden, difficult-to-control injuries. Finger locks can be applied from virtually any grappling position and are particularly relevant in self-defense and traditional martial arts. [3] In competition, finger and small-joint manipulation is prohibited in nearly all major rule sets: the IBJJF [1], ADCC, judo (IJF), and MMA under Unified Rules all ban small-joint manipulation. The prohibition stems from the speed at which finger joints can be broken — there is minimal warning between the onset of pain and structural failure, making a controlled tap out unreliable. Despite competition restrictions, finger locks remain an important part of traditional jujutsu (yubi-waza), aikido (yubi-dori), and law enforcement control techniques. [3],[4]
History & Origin
Finger-locking techniques (yubi-waza) are well-documented in classical Japanese jujutsu, where they served both as standalone submissions and as methods for controlling an armed opponent's weapon hand. [2],[3] Daito-ryū Aiki-jūjutsu, the parent art of Aikido, features extensive finger and wrist manipulation techniques (te-hodoki and yubi-dori) developed for neutralizing samurai armed with swords. [4] In Aikido, Morihei Ueshiba preserved and refined these small-joint techniques as part of the art's control-oriented philosophy. [4] Chinese martial arts — particularly Chin Na (擒拿, seizing and locking) — include sophisticated finger and joint manipulation systems documented in texts dating to the Ming Dynasty. In Western martial traditions, finger locks appear in medieval European combat manuals, including Fiore dei Liberi's 'Fior di Battaglia' (1409), which illustrates finger-breaking techniques used in armored and unarmored combat. [9]
Effectiveness
Lineage
Competition Record
Finger locks are generally banned in IBJJF competition but legal in some submission grappling formats and MMA. [1]
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Biomechanical Mechanism
Primary Action — Hyperextension of the elbow joint — the hips drive upward against the posterior humerus while controlling the wrist
Joints Involved — Elbow (extension beyond normal ROM), wrist (stabilized), shoulder (isolated and controlled)
Force Vector — Posterior-to-anterior force on the upper arm with fixed distal anchor at the wrist creates a lever arm across the elbow
Leverage Principle — Hips act as the fulcrum — the longer the lever (full arm extension), the less force needed to hyperextend
Position & Entry
From dominant position — Isolate the target limb, secure the controlling grip, and apply force beyond the joint's range of motion
From guard (bottom) — Control the limb from guard position, configure the submission grip, and apply the lock
From transition — During a scramble or positional change, catch the exposed limb and lock the submission
Videos
Do Finger Locks Work In A Street Fight?
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Grip Finger Lock·Budo Brothers
When we were all in school, we knew the feeling of someone grabbing our fingers and pulling on them. But do finger locks…
2 videos
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Ratings
Risk of injury to the person this technique is applied to
5
High5/10
Finger locks cause dislocations and ligament sprains but rarely career-ending injuries
Skill level needed to execute this technique reliably
Beginner
Whether this technique is allowed under major competition rule sets
Illegal
— IBJJF — Small joint manipulation prohibited at all belt l...
IBJJF Rules Book v6.0, June 2024PDF— IJF — Prohibited
IJF Sport and Organisation Rules 2025, Article 27PDF— ADCC — Small joint manipulation prohibited
ADCC Rules Update, April 2025PDF— Unified MMA — Small joint manipulation is a prohibited foul
Unified Rules of MMA, August 2025PDF— FIAS Sport Sambo — Prohibited
FIAS International Sambo Competition RulesPDF— FIAS Combat Sambo — Prohibited
FIAS Combat Sambo RulesPDFTraining Notes
✓Grip and finger locks attack the small joints of the hand and fingers — hyper-extending or rotating the fingers, thumb, or wrist beyond their natural range (Danaher, New Wave Jiu Jitsu, 2020)
✓Finger locks are illegal in most grappling competitions (IBJJF, ADCC) but permitted in catch wrestling, some MMA organisations, and self-defence contexts
✓The small joints of the fingers are extremely vulnerable: even moderate force can dislocate or fracture fingers — making these locks highly effective but dangerous
✓Finger locks work by isolating one or two fingers from the others and then applying leverage — the isolated finger cannot recruit the hand's full strength
✓Grip breaking often uses finger lock principles: peeling fingers one at a time to break the opponent's grip exploits the same vulnerability
✓The thumb is the most commonly attacked digit: the 'can opener' and 'goose neck' variants target the thumb's limited range of motion
✓Historical jujutsu (yubitori, finger-taking techniques) included extensive finger lock systems — these were practical self-defence tools against gripping attacks
Common Mistakes
!Applying finger locks in competition where they're illegal — know the rules; finger locks are banned in most grappling competitions
!Using excessive force — finger joints break easily; minimal force is needed to create a submission
!Attacking all fingers at once — finger locks work by isolating one or two fingers; attacking the whole hand allows resistance
!Not knowing the legal boundaries — even in systems where finger locks are allowed, there are usually limitations on which techniques are permitted
!Relying on finger locks as primary submissions — they are supplementary techniques, best used to break grips or create transitions
!Applying finger locks without positional control — like all submissions, positional dominance must precede the lock
!Training finger locks at full speed — the small joints break before the partner can tap; always apply slowly and with control
Related Techniques
Counter Techniques
Setup Chain
1Establish Position — achieve the controlling position needed for this submission
2Create the Threat — begin the submission setup to force a defensive reaction
3Secure the Hold — lock the submission grip with proper body mechanics
4Finish — apply increasing pressure until the opponent taps or the joint/choke takes effect
Sources & References
Primary Source
Kodokan Judo — Jigoro Kano (1986)
1BookKodokan Judo — Jigoro Kano (1986)
Small-joint techniques excluded from judo competition rules
2BookFior di Battaglia — Fiore dei Liberi (1409)
Medieval finger-breaking techniques in Abrazare
3BookMastering Jujitsu — Renzo Gracie, John Danaher (2003)
Historical jujutsu finger lock (yubi-waza) context
Official Kodokan ground technique classification system
Standard Japanese martial arts terminology (kanji/hiragana)
6OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
7CitationKodokan Judo — Jigoro Kano (1986)
Small-joint techniques excluded from judo competition rules
8CitationFior di Battaglia — Fiore dei Liberi (1409)
Medieval finger-breaking techniques in Abrazare
9CitationMastering Jujitsu — Renzo Gracie, John Danaher (2003)
Historical jujutsu finger lock (yubi-waza) context
Community
Athletics
Requires
grip strength, joint isolation ability, positional control
Favours
strong forearms and stable base
Key muscles
forearm flexors, core stabilisers, hip muscles for base
Sub-techniques
Notes
Small joint manipulation (finger locks, toe locks) is banned in virtually all competition — IBJJF, IJF, ADCC, and Unified MMA rules all prohibit individual finger attacks. Used only in self-defense and military combatives. (IBJJF Rules; Unified Rules of MMA; IJF Rules; military manuals)
Frequently Asked Questions
How do I practice finger locks without relying on sight?
Core JKD emphasizes developing feel rather than visual awareness through drills where you use the same side hand as your partner and manipulate using the back of your hand to develop tactile sensitivity.
What's the right way to set up a finger lock in a fight?
According to Budo Brothers, you should never grab or snatch for the fingers in the air—that's the wrong approach. Instead, use fundamental Jeet Kune Do trapping exercises to control your opponent's hand and create the opportunity for the lock.
Can I combine finger locks with other striking techniques?
Core JKD notes that you can throw in strikes, kicks, knees, or headbutts from the finger lock position depending on your fighting style and what the situation calls for.
How does the Grip Finger Lock work?
Grip and finger locks are submission techniques that target the small joints of the hand — the fingers and thumb — by hyperextending, hyperflexing, or twisting individual digits or groups of digits beyond their anatomical range. These techniques exploit the relatively low structural strength of the finger joints compared to larger joints, making them effective but also prone to causing sudden, difficult-to-control injuries.
Where does the Grip Finger Lock come from?
Finger-locking techniques (yubi-waza) are well-documented in classical Japanese jujutsu, where they served both as standalone submissions and as methods for controlling an armed opponent's weapon hand. Daito-ryū Aiki-jūjutsu, the parent art of Aikido, features extensive finger and wrist manipulation techniques (te-hodoki and yubi-dori) developed for neutralizing samurai armed with swords.
Is the Grip Finger Lock legal in competition?
IBJJF: banned — Small joint manipulation prohibited at all belt levels; IJF: banned — Prohibited; ADCC: banned — Small joint manipulation prohibited; Unified MMA: banned — Small joint manipulation is a prohibited foul; FIAS Sport Sambo: banned — Prohibited; FIAS Combat Sambo: banned — Prohibited
How dangerous is the Grip Finger Lock?
Danger rating 5/10. Finger locks cause dislocations and ligament sprains but rarely career-ending injuries
How do I set up the Grip Finger Lock?
The standard setup chain: Establish Position → Create the Threat → Secure the Hold → Finish.
How do I defend against the Grip Finger Lock?
Standard counters include: Early Recognition — identify the submission attempt early and begin defence immediately / Posture and Base — maintain strong posture and base to prevent submission setups / Grip Fight — deny the attacker their preferred gripping configuration.
What are the variants of the Grip Finger Lock?
Common variants: Standard variation (primary grip configuration and finishing angle); Gi variation (using the gi material for grip assistance and control); No-gi variation (adapted grips for submission grappling without the gi); Transition variation (applied during a positional change or scramble).
How effective is the Grip Finger Lock in competition?
Finger locks are generally banned in IBJJF competition but legal in some submission grappling formats and MMA.
What are common mistakes when doing the Grip Finger Lock?
Top errors to watch for: Applying finger locks in competition where they're illegal — know the rules; finger locks are banned in most grapplin… / Using excessive force — finger joints break easily; minimal force is needed to create a submission / Attacking all fingers at once — finger locks work by isolating one or two fingers; attacking the whole hand allows re… / Not knowing the legal boundaries — even in systems where finger locks are allowed, there are usually limitations on w….
What are other names for the Grip Finger Lock?
The Grip Finger Lock is also known as Yubi Kansetsu Waza, Small Joint Manipulation, Finger Lock, Yubi-kansetsu.