Bench Drill Part Heavy Industrial Bench Drill Spindle Assembly For Z516 Model:16mm integrated Spindle assembly Material:High quality Metal Size:as shown Number of splines:6 Spline width:4mm Spline depth:2mm Packing: 1 Spindle Assembly Note: Manual measurement, there will be 1-3 mm error Suitable for most bench drills. Please visit our store for other choice. International Buyers - Please Note.