Abstract: The present invention relates to a hand tool, comprising a tool member, of a first material, an elongated shaft, of a second material and a connecting member, of a third material comprising plastic. The elongated shaft further comprises a handle portion in a first end and an insert portion in a second end. The hand tool further comprises a sealing ring arranged to surround the insert portion to prevent leakage of the third material during manufacturing. A manufacturing method for such a hand tool is also presented, said method comprising arranging a sealing ring around an insert portion, arranging the insert portion and a tool member in a mold, injecting material comprising plastic in a cavity space so as to form a connecting member and removing the hand tool from the mold.

Abstract: The present invention relates to an ear protection device, which comprises an ear cushion for contacting around an ear to seal off an interior space of the ear protection device from surroundings, a switch comprising a holder portion and a shaft with a guide, a shell comprising an interior section and a shell aperture wherein edges of the shell aperture engage with the guide of the switch, and said shell is provided between the ear cushion and the switch. The switch is rotatable between a first position and a second position, wherein in the first position ventilation holes are exposed from the interior section of the shell allowing air to flow inside the interior space, and in the second position the ventilation holes are covered inside the interior section of shell preventing the air to flow inside the interior space.