There are 4 types of M6 Triangle Washer Head Screws for options, like M6*10, M6*12, M6*16, M6*20. You are free to choose the appropriate length as your requirement. Specification: Model: M6ST1; Size: M6; Length: 10/12/16/20mm; Quantity: 50Pcs/Set; Material: Stainless Steel; Color: Silver; Screw Drive Type: External Triangle; Screw Head Type: Triangle Washer Head; Features: 1. With 10, 12, 16, 20mm screw lengths for option, choose the appropriate length you need. 2. Made of 304 stainless steel, ensure its high hardness and corrosion resistance, anti-rust and durable in many environments. 3. Silver appearance, shines with metal luster, will fit well in different occasions. 4. Widely used for industry, equipment, quadcopter, DIY crafts, home repairing and so on. 5. It can give you more protection since it is not easy to be unlocked by thieves. Package Included: 1 x 50Pcs/Set M6 Triangle Bolts