Earth Claws

Onua
Toa Mata Onua's Toa Tools were claws which helped him dig, pick up large boulders, etc. They were part of his hands, so he could not remove them.

Nuhvok Va
Nuhvok Va also used claws.

Trivia

 * In BIONICLE Heroes, the claws are Nuparu's default weapon. They fire out grenade-like blasts that explode after a few seconds, but can be detonated manually.