Used to help you in the installation of ÷hlins fork cartridges. This 'multi tool' wrench includes the tools seldomly found in a toolbox but are necessary to install Ohlins cartridges without hassle. Includes: - 50mm. 8 sided closed end used for installing caps - 41mm. 6 sided closed end used for installing caps - 13mm. can hold bottom nut on drop in cartridges - 14mm. Can set preload on cartridges - 19mm. Can hold nut inside cartridge when tightening Compatible with the following cartridges: - FKS 212 NIX 22 Cartridge Kit - FKS 221 NIX 22 Cartridge Kit - FKS 228 NIX 22 Cartridge Kit - FKS 508 NIX 30 Cartridge Kit.