and high quality Feature: Made of high-quality materials, durable, firm, and has a long service life. High hardness, resistant to rust and deformation, anti-corrosion and anti-abrasion. Five-star shaped head thread clamping screws, suitable for industrial use. Available in various sizes and types (M6/M8), to meet different needs. Clamping screws only; other accessories shown in the picture are not included. Specifications: Item Type: Clamping Screws Material: Plastic + Metal Size: (Optional) Screw thread diameter: 6mm / 0.2in, 8mm / 0.3in Length: 16mm / 0.6in, 20mm / 0.7in, 25mm / 0.9in, 30mm / 1.1in, 35mm / 1.3in, 40mm / 1.5in Color: Black + Silver Optional Type: M6-16, M6-20, M6-25, M6-30, M6-35, M6-40, M8-16, M8-20, M8-25, M8-30, M8-35, M8-40 Quantity: 10 pcs Note: No retail packaging. Transition: 1cm = 10mm = 0.39inch Please allow 01cm error due to manual measurement. Ensure you are comfortable with this before purchasing. Due to differences in monitor displays, the image may not reflect the actual color of the item. Package Includes: 10 x Clamping Screws