Disclosed herein is a method and apparatus for transmitting and receiving a scheduling request using a shared resource based filtering method in a radio communication system. The base comprising a main locating surface, an alignment surface, and a second solid surface or stop edge. A supporting table is coupled to the frame, the supporting table having a counter blade, the supporting table adapted to support the scrap material. Rake faces formed on the upper face individually have positive rake angles and have twisted-inclined surfaces so that the rake faces become closer to the mounting face along the respective cutting edges from the nose part toward a region disposed along a diagonal line between obtuse-angle corners.