The Optional Spring Kit for Strainrite Chain Strainers
Strainrite chain strainers are offered with and without a spring. The Chain Strainer Spring Kit is the optional kit Strainrite supplies for adding one — fit it to a standard chain strainer that came without, or replace a spring that's seen enough seasons.
It's a genuine Strainrite part, made for the strainers it goes on, and it's the kind of thing worth having in the toolbox before you need it rather than after.
Need the strainer itself? See the Strainrite Standard Chain Strainer or the FX2 Contractor Chain Strainer.
The optional spring kit — a genuine Strainrite part for the strainer you already own.