Abstract: Portable saw includes a housing and a continuous saw blade provided in the housing. A throat in housing is shaped and sized for exposing a portion of a continuous saw blade so saw blade contacts and cuts an object brought into contact with the saw blade, in use. A power unit detachably attached to housing includes a drive for driving the saw blade. A side handle is provided on housing, and an end handle is detachably attached to the housing. The housing, saw blade, power unit, and handle are sized so user can carry and use the portable saw. Housing includes two halves detachably attached to each other so the user can take them off and replace them with a different housing having different handles and a different throat to provide a different throat having a different size and shape than the throat of the removed housing.