Knurled handle provides comfortable torque control for precise tightening
Vertical push design enables quick and accurate check of square nuts
Compatible with 6 mm wide square nuts on truck chains, including Izumi V chains
Durable solid construction for repeated use in demanding conditions
Nominated by professional mechanics for use in high-level cycling events
Summarized by Shop
A special tool for NJS-certified chains co-developed with a Keirin bike inspector.
CHECKER is an innovative tool to check the 6mm square nut closure system of NJS chains, such as IZUMI V-Chain. The small nuts on this type of track chain can loosen and sometimes can be lost if not properly tightened. This professional tool was updated wit
