Wall drill
A wall drill is a Outil used to drill a hole using a hammer in a wall in order to insert a Piton there into expansion. The point of the wall drill is generally out of tempered steel and a handle makes it possible to maintain it during drilling. The appearance of technique in Alpinisme caused many controversies, because the walls before insuperable (large flagstones, overhangs without catches) found a whole then a solution.