12 PCS M6 x 20mm Male Thread Knurled Clamping Knobs Star Knob Thumb Screw on for
12 PCS M6 x 20mm Male Thread Knurled Clamping Knobs Star Knob Thumb Screw on Type for Machine Tool (M6 x 20mm). M6x20 thread clamping knob black plastic hand knob star shape screw on knob for machine tool.