Description: 1. Material: Knurled thumb screws are made of brass, ease of machining, and an attractive appearance, rust resistance, corrosion resistance, good wear resistance, high strength, and good fastening function. 2.
Description: 1. Material: Knurled thumb screws are made of brass, ease of machining, and an attractive appearance, rust resistance, corrosion resistance, good wear resistance, high strength, and good fastening function. 2.