3 electric industrial sensors magnets side mount iron untested

Description

this sale is for 3 industrial electrical pieces ,,,7-3/4 inches long,3 inches wide,1-1/4 inches thick,,i am not sure what these are even for,,,or what they do,,and are untested,,,but i do not think they were ever used,,,the bottom pegs has some light tarnished spots ,,and bodies have just some light wear from handling,,,,i see nothing cracked or broken,,,,any questions just send me an email,,thank you