Align the depth indicator with the “0” graduation of scale. 5 Loosen pole lock knob, and raise until indicator aligns with the graduation representing the desired cutting depth. Tighten pole lock knob. 6 Loosen the lock lever and press the tool body down until the stopper block to obtain the desired cutting depth. (2) As shown in Fig. 5 (a), loosening the two nuts on the threaded column and moving them down will allow you to move down to the end position of the bit when the lock lever was loosen