The hoof hammer is a hammer (300-600 gr) with a round, flat face and split pin that closely resembles the claw hammer (carpenter) but can still be distinguished from it because its claw is usually shorter and more curved.
The farrier uses this hammer to nail the horseshoe - when it fits perfectly on the hoof after several heatings and hammerings. The nails should be hammered outwards so as not to hurt the flesh of the foot. The claws are used to rivet the nails that protrude beyond the hoof. [MOT]