Manufacturers explain crowbar crowbar:
Crowbar is a working tool, widely used in railway track inspection and maintenance, as also appeared in Half-Life, the protagonist skillfully therefore also friends called "physics sword", or the origin of the stick. It is the use of leverage so that the weight to overcome the force of gravity, the weight lifted and displaced from the ground, stick a crowbar into hexagonal, round and flat pry bar. Hexagonal rod and round bars can be processed into: two round, two flat or a round a flat, as construction tools or hardware tools, which can be used as car lorry tools. Only the length of the thickness of the flat pry points, as the majority of tire repair tools.