Model Number: 3.5X55 Brand Name: Qichuan Key Specifications/Special Features: Drywall screws:Size: from 10 to 254mmDiameter: M3.0, M3.5, M4.0, M4.5, M5.0, M6.0Finish: black/grey phos-phated, yellow/blue zinc-platedTianjin Qichuan Metal company limited, which established in 1998, specialized in manufacturing all kinds of metal toolsWe have our our factory located near to the port and airport and also have the independent export and import rightsThese advantages ensure punctual delivery time and save cost for you