MK0 items represent a refined approach to component engineering, with special consultation with Team Visma Lease A Bike. MK0 Centerlock Rotor Lockrings feature a new design language and an exclusive color. For this new aesthetic, each premiumn 7075-T6 lockring spends extra minutes in a CNC lathe, before undergoing thorough QC inspection, anodizing in the new Shadow Gray color, and branding before it can be installed on a hub. External spline is compatible 44-16BB bracket tool for installation and removal (sold separately) Compatible with 12mm, 15mm, and 20mm thru axles and QR MK0 lockrings spend 3x the time in the CNC lathe, resulting in a substantial reduction in weight without compromising strength and durability Premium 7075-T6 aluminum MK0 rotor lockrings are anodized in the new Wolf Tooth Shadow Gray color for additional protection and attractive look Made at the Wolf Tooth machine shop in Minnesota, USA Wolf Tooth MK0 Centerlock Brake Rotor Lockring Disc Rotor Parts and Lockrings UPC: 810159403399