A metal cutting circular saw is provided with an upper blade guard which includes a first sight window disposed in a first side surface and disposed in a plane angularly offset from a plane of the blade. Fastening is by means of a retention element of shape memory material associated with the second component which is reconfigurable between an open position and a closed position. Other processes are also provided as well as novel compounds prepared by and used in such processes. Additional functions of the present invention include allowing users to opt-out or opt-into solicitation lists, and enabling users to automatically monitor their credit report. The mating board has an open therein.