instrumentation (a piece of equipment or tool) used to effect an end

secure with, or as if with, bars

a wood or metal bar to which a rope can be secured (as on a ship or in mountain climbing)

the part of a lock that is engaged or withdrawn with a key

a sliding bar in a breech-loading firearm that ejects an empty cartridge and replaces it and closes the breech

a straight bar of light metal with a spirit level in it

a horizontal bar on which you can chin yourself