Lathe Tool Rest Assembly Small Machine Tool Rest Accessories Small Plate Square JY250 Base length :119mm Base width :73mm Installation hole spacing :100mm Mounting aperture :9mm Base circle diameter :72mm The diameter of the positioning step is 10mm Total weight :3.91KG JY300 Base width :104mm Key width :12mm Installation hole spacing :106mm Total weight :5.26KG JY290VF Disc diameter :89mm Hole distance :110mm Small aperture :11mm Total weight :7.31KG