A sander can include housing, and a motor assembly in the housing. For example, the application uses SIP for communication with the server and the authentication service is provided via a GSM based telephone network. The radially outer portion includes a radially outwardly-facing tire-engaging surface. Further, based on the received request, user input is obtained from an input device of the host device and transformed into verification data. The x-ray detector is shifted by a distance shorter than half the length of the x-ray detector along a line parallel to the plane of rotation, in a tangential direction of the plane of rotation generated by the x-ray source. The cutter body may comprise a plurality of retaining slots and a plurality of support portions.