The Park Tool Adjustable Spanner SPA-6 is built for one job: removing and installing the retaining rings on self-extracting cranksets. The adjustable pin design means a single tool handles a range of retaining ring sizes, rather than requiring a drawer full of fixed spanners. The SPA-6 uses 2.2mm pins — sized to seat securely in the pin holes of self-extracting cranksets without slipping or rounding out the ring. Heavy-duty construction is standard across Park Tool's workshop line, and this spanner is no different — it's made to handle the torque these retaining rings often need, especially on cranks that haven't been serviced in a while. Park Tool Adjustable Spanner - SPA-6 Specs at a Glance Pin diameter: 2.2mm Adjustable: Yes — fits a range of retaining ring sizes Compatible with: Self-extracting crankset retaining rings Construction: Heavy-duty
