OTF Spring-Loaded Fidget Knife / Durable and Smooth, Comfortable Grip / Ultimate Enhanced Version

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Leave a comment and upload photos 🫶🏻I will help you solve it immediately!

Updates:

2026-03-26:

Released a thicker textured cover plate, providing some anti-slip effect

2025-10-15:

Added a new blade type: Shark Blade

2025-10-10:

User feedback: When pushing the handle, it is recommended to press the upper or lower part; pushing the middle is prone to failure. It is speculated that pressing the middle too hard can easily deform the spring, leading to insufficient elasticity. This point can be optimized in the future. If you have other ideas or encounter the same problem, please leave a comment, thank you!

2025-10-8:

⚠️If it cannot retract but can eject smoothly, please check if the cover plate is installed incorrectly according to the diagram

2025-9-22:

➊A new blade type has been added to the entire series

➋Added Bambu Lab PETG HF print profile (optimized and strengthened the spring's elasticity, reduced the cutout length of the spring clip)

2025-6-25:

Someone gave feedback "Can you include a comb, girls like it", so a comb was added

Installation animation diagram (note the direction of the cover and spring installation):

⚠️Attention⚠️

• Many parameters of the parts have been adjusted and are not compatible with the ultimate version
• Printing test materials are: Bambu Lab PLA Basic and PETG HF(If you encounter problems with other materials, please describe them in detail so I can optimize or adjust accordingly.)

Improvements based on the original version:

• The exposed mechanical structure of the original version is prone to accidental touch, leading to spring opening and closing failure

  "Improvement: Hidden all structures prone to accidental touch"

• The switch of the original version was very uncomfortable to hold and protruded unpleasantly

  "Improvement: Modified to a large-area thumb push"

• The original version had sharp edges that were uncomfortable to hold, especially the right-angle tail

  "Improvement: Changed to rounded chamfers, enlarged fillets at the tail"

• The hook switch structure of the original blade was very prone to fatigue and breakage

  "Improvement: Widened the end of the hook"

⭐️Gravity Shark Blade (Click to view)⭐️

⭐️Gravity Shark Blade (Click to view)⭐️

If you encounter any problems during printing, feel free to leave a comment or send me a private message.
I will assist you in identifying the problem and providing a solution as soon as possible.🙏🏻

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