A trigger made as an anti-stress tool.
All parts, outer shell, spring and trigger are molded together. 
Numerous tests were carried out to find the right compression of the internal spring. I think he's in the right compromise. Fun and relaxing.

Accessory 

Add an accessory to turn it into a key ring. With M6 connection to fit under your Push Trigger.

Also try

Try the Press Trigger to train your other fingers

NOTE

I recommend using my print profile. Some parts print at different speeds.

The plunger is blocked originally, with a small internal stop, to avoid moving during printing. The first time you use it, you need to use more force to unlock the plunger. It has been noticed that black colored filaments are more resistant, which is why it is recommended to use colored filaments.

TIPS
Since the object is narrow and tall it is advisable to follow some precautions such as:
a) Use textured plates for better adhesion;
b) If you use smooth plates, use a glue stick or heat the plate to 50°C (ventilate the printing chamber well).