Lyn-Tron's Push Thumb Screws come in all common threads and several thread lengths. The high-quality knurl allows for an easy grip to tighten these screws into place by hand, but have also been used for their decorative and unique appearance. The round shape provide a nice finished look. Brass is corrosion resistant, nonmagnetic, and easily machinable. Base metal is yellow, but many plating options are available when different colors are required.