Super B 2 in 1 chain checker and chain hook function TB-3326
TB-3326 is made from high grade steel and made by laser cut. One side is chain wear indicators.A chain reaches .0.75% and 1% wear, which most mechanics suggest the chain needs to be replaced. The other side is the chain hook.
Super B / TB-3326 - 2 in 1 chain checker and chain hook function (EN)