●The material is made of titanium alloy Ti-6Al-4V, also known as 64 titanium ●Head Diameter: 0.6 inches (14 mm); Head Height: 0.1 inches (3.5 ●Dimensions: M6x12mm, M6x15mm (optional) Pitch: 0.04 inch (1.0 mm); Use T25 torx wrench ●Package Includes: 5 x M6 Titanium Alloy Bolts