Applications: Widely used in lathes, drilling machines, packaging and woodworking machinery, printing and industrial equipment and fixtures. CoCud Tee Wing Knobs Thumb Screw, M6 x 30mm Male Thread DIY Thumb Screws 20 Pack M6 X 12mm Tee Wing Thumb Screws - Standard Tee Wing Knobs M6 The zinc plated carbon steel threaded studs on T knobs ensure durability, strength, functionality and wear resistance. Premium plastic clamping knobs provide durability, a smooth surface and comfortable grip. Sturdy and durable thumb screws for the ultimate in adjusting and tightening control. The tightly-in metal insert are machine-injected at high temperatures to securely connect the parts... Material: The head of the Thumb screw is made of plastic and the threaded rod is made of carbon steel. Uxcell 10 Packs M6 x 12mm Male Thread T/Z Wing Knobs Thumb Screw Clamping Knobs Grip Black. Free shipping; Free 30-day returns Package includes: You will receive 20 pieces tee wing knobs thumb screws.