Thumb Screws have a 1” Round Plastic Knob.
Round Knob is made of DelrinPictures are for reference, NOT actual number of pieces50pc's - 100pc'sThread Material is Stainless Steel - anti-rust and anti-corrosion.Strong and durable. (Anodized Black Alloy will rust)USA Manufactured and Shipped from the USA
HDsmallPARTS/LocEzy