An angle grinder is provided including a rotating handle configuration allowing the handle of the angle grinder to be locked in different positions relative to the angle grinder housing. In a first aspect the invention proposes that the driving means which drives the payload support platform along a rail is also used to move that rail relative to the payload support platform and a support rail so that the position of the rail can be changed during the movement of the payload support platform between one site and another. The present invention also provide methods for making intraocular lenses from the copolymers. Multiple methods of image cropping may be implemented to accurately assess the borders of the DL, and a secondary layout identification process may be performed to ensure that the content being extracted is properly classified. In another embodiment, a small amount of cavitation is acceptable if the cavitation is below a threshold in which shock waves occur. The transmittingreceiving unit transmits a command message according to item selection with respect to the output activated columns.