PARK TOOL - HCW-17 FIXED GEAR LOCKRING WRENCH
The HCW-17 features two different radius hooks for a precise fit on most fixed-gear lockrings. The HCW-17 has two different ends. One is sized to fit rings with an outside diameter of 41 to 42mm. The other side fits rings of 43 to 44mm.
The HCW-17 also fits single speed cassette hubs using lockrings with external notches. 29cm (11-5/8”) in length for excellent leverage.