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branwen
Most of them use the same splined cup tool as common square taper cartridges. Of course, with Shimano there's always and exception, and the XTR M950 has its own external tool. You need a different crank puller, as the centre of a square taper puller will disappear down the bolt hole of Octalink or ISIS axes. You can bodge it with a stack of dimes, but I think a British penny is just slightly too big and will damage the splines on the crank.