Features: The gasket is added between the slider and the synchronous wheel, isolating of 1mm to lock tightly. Smooth rotation, no mutual grinding, good accuracy. This unpowered spindle is precision machined by grinding machine with an accuracy of 0.005mm. Can be used to DIY bench drills, bench mills, table saws. etc. Can work with 4 inch grinding wheel, cutting saw blade, etc. Specification: Material: Steel Package list: 1 * Connecting Rod 1 * XL20 Tooth Synchronization Wheel 1 * Slider 1 * Gasket 2 * Bearing 2 * Hex Wrench 1 * B16 Drill Chuck Set 2 * Screw Sleeve 2 * Big Wrench 1 * M10 Shaft Sleeve Package List 1The gasket is added between the slider and the synchronous wheel, isolating of 1mm to lock tightly. 2Smooth rotation, no mutual grinding, good accuracy. 3This unpowered spindle is precision machined by grinding machine with an accuracy of 0.005mm. 4Can be used to DIY bench drills, bench mills, table saws. etc. 5Can work with 4 inch grinding wheel, cutting saw blade, etc.