The Hex Lab 3/32" Titanium Cogs are CNC-machined from bulletproof titanium. They are designed to fit Shimano™ compatible cassette hubs & have a 5mm wide inner base, giving a more solid interface with the cassette body. Key differences: The Hex Lab 3/32" CNC Titanium Cogs are engineered & crafted for durability w/out compromising weight. They offer the strength & wear resistance of steel & are lighter than aluminum. As a result, they yield better shock absorption than the Box One Aluminum or Box One Chromoly Cogs. They are available in an oil slick or natural finish. FEATURES: Shimano™ Compatible Driver Ti-6Al4V Heat-Treated to HRC35 3/32" or 1/8" Chain Compatible Lightweight + Durable