Dewalt dw0889kd line laser with detector dewalt dw089kd xj this line laser with detector from dewalt is a 3 way self levelling cross line laser accurate to plusmn03mmm in levelling applications designed to offer self levelling up to 4deg surface angle with automatic out of level indication marking a levelled line in seconds while the 3 button operation and low battery indication is for ease of use the adjustment dial is for fine line movement vertical and side with built in magne