Park Tool SW-6 Spoke Wrench Description: This is the Park Tool SW-6 Spoke Wrench. Professional quality, precision-sized spoke wrenches are hardened and nickel-plated for long service. Park Tool Spoke Wrenches are vinyl coated in one of five colors indicating the size at a glance. Features: Fits 0.146"/3.7mm spoke nipples 3-sided nipple interface for secure engagement Vinyl coated in one of 5 colors to help determine sizing at a glance Professional-quality made with nickel plating for longevity