You asked with the words: baby tonfa come si usa. Based on the context, it seems you’re looking for practical guidance on how to use a Baby Tonfa for personal defense, including legality and basic handling. Here’s a concise, actionable overview. Direct answer

• What a Baby Tonfa is: a compact self-defense tool related to the Tonfa, often marketed as a keychain or small baton-like device, designed to be gripped between the hand and the palm to deliver controlled strikes or to deter an aggressor. See below for usage notes and considerations.
• Basic ways to use it:
  • Grip and alignment: hold the Baby Tonfa so the extension runs along the forearm, with a secure grip around the handle. Ensure the striking side is oriented toward your target, and the device feels stable in your hand.
  • Point/press use: at close range, you can use the point or edge for deterrence or light contact to create space, keeping in mind control and safety to avoid self-injury.
  • Striking using momentum: with a quick, controlled wrist or arm motion, you can generate a brief impulse to create distance or interrupt an attack. Use the mass of any attached keys if the device is designed to incorporate them, but prioritize grip security to prevent self-harm.
  • Non-weapon deterrence: simply presenting the device and vocalizing a warning can sometimes deter an aggressor without making contact.
• Training tips (safest approach):
  • Practice basic grip, retention, and controlled strikes without a live partner first.
  • Work on wrist stability and forearm alignment to minimize self-injury during use.
  • If possible, seek instruction from a certified self-defense instructor who can tailor safe drills to your local laws and your fitness level.
• Legal considerations:
  • Legal status of Baby Tonfa and similar tools varies by jurisdiction. In many places, such devices may be regulated or restricted, especially when marketed as a weapon or concealed tool. Some locales permit legal self-defense uses but restrict carry, possession, or specific configurations. Always verify local laws before acquiring or carrying such a device.
  • Even where legal, there are often strict rules about use: proportional force, necessity, and what constitutes self-defense. Documentation and understanding of applicable self-defense statutes are advisable.
• Safety and ethical notes:
  • Do not rely on any such tool as a substitute for avoidance, de-escalation, or escape planning.
  • Training with any self-defense tool should emphasize personal safety and legality, not aggression.

If you’d like, I can tailor this guidance to your location (country/state) and provide a brief legality check and safer alternatives (e.g., personal alarms, whistle, non-damaging self-defense training) along with reputable sources.