Product Name: Handwheel CNC Jog Knob for T8 Screw Model NO.: C017 Application: Ox CNC Workbee Transport Package: Carton Origin: China HS Code: 8504409999 Product Description OLEARN CNC Jog Knob Handwheel For T8 Screw CNC Jog knobDesigned as a dual purpose part this can be used as a hand wheel (jog knob) or a even a wheel hub!Use this knob to manually fine tune your machines positions. For instance you can jog over close to the starting point of a job and then use the knob to set the bit to the materialHas 4 threaded (M5) holes that allow for adding a simple aluminum spacer and screw to create a jog handle (see pic) The knob also has a knurled grip so no handle is necessary.Also an interesting mention is that this knob doubles as mounting hub for projects that may require a wheel hub. Using the 4 M5 tapped holes, one can quickly attach this knob to a variety of applications.8mm boreAluminum (Black)Knurled gripIncludes Dual set screws (M5 x 4mm)Can be used with our without a handle