Durable plum head: the plum head is made of high-quality plastic, good hardness and impact resistance, and is durable. Stainless screws: the screws are made of high-quality iron, galvanized surface, high hardness, rust-proof, strong and durable. Easy to use: large knurled plastic handle for a comfortable grip, fully threaded design for easy installation, removal, and adjustment. Wide application: these thumb screws are widely used for mechanical equipment, electronic equipment, communication equipment, hardware, furniture decoration, and other related industries. Set of 10 units: each package includes 10 M6 x 1.575 in thumb screws. Thread length: 1.575 in/1.57 inches; Thread diameter: M6, metric thread.