M6 Titanium Bolt 10/15/20/25/30/35mm Button Head Torx Screw for Bicycle Fastener. ● Wrench Size: M6 Use T30 Torx Wrench. Characteristic of Titanium Is More Obvious. ● 【Widely Used】:Titanium Alloy Bolts Are Light in Weight, High in Strength and High in Hardness.