1 protection ring under the head to preserve the shaft from strikes.

1 ring on the end of the shaft to rap and adjust pieces.

More precision :

- working parts carefully polished.

Comfortable and ergonomics :

- clear and well controlled impact, it avoids any discordant movement which could damage the tool or the striking part.

- general balance : tool asymmetry with the eye to avoid any vibration around the eye which could react along the handle.

- hands and arms do not suffer from any lateral deviation or rebound.