It is not the same as a stock type,usually on a stock impellor you just use a big wrench to loosen the impeller and a spline tool to hold the shaft.On a Solas the impellor has kind of a square cut in it that the Solas tool fits into or several slots that it fits into,you will also need the spline tool to hold the shaft.A new Solas impeller usually comes with the impeller installation too but not a spline tool.