2 Axis DRO Digital Readout Lathe Pacakage Linear Glass Scale 0.0002" Fit on 36 and 40" bed lathe Display Unit with diameter reading Long lasting durable linear glass scale accurate in 0.0002" or 5um. Slim scale on the corss slide. Scale are sealed from inside aginest wet moisture and ash Pacakage include many brackets and hardware for easy installation Limited warranty cover up to 5 years