4 Axis DRO Digital Readout Mill Package Linear Glass Scale 0.0002" With Digital Quill Scale Mutilfunction Display Unit Long lasting durable linear glass scale accurate in 0.0002" or 5um. Slim scale on the corss slide. 3 glass scale cover x, y and knee, then there is a digital scale on quill head Pacakage include many brackets and hardware for easy installation Limited warranty cover up to 5 years