【Package Content】The package includes 4 clamping knobs, thread specification:M6×20mm, handle diameter: 25mm 【Durable Material】The thread clamping knob is made of high-quality bakelite, which has good toughness and impact resistance, making it sturdy and durable. The surface of the screw is galvanized to prevent rust. 【 Easy to use 】 The bakelite thumb screws knobs provides a comfortable grip, and the fully threaded screw design is easy to install, disassemble, and adjust. 【Smooth Surface】The star head knob is very smooth and very suitable for gripping. Beautiful and practical, safe and reliable, with good tightness. 【 Widely used 】 Thread knobs are widely used in lathe machinery, mechanical equipment, instruments and industrial equipment., Weight: 0.15873282864 pounds, Manufacturer: Othmro