MODEL:SPA-1.. TOUGH HIGH CARBON STEEL.. HANDLE IS VINYL COATED.. FITS ADJUSTING CUP ON MANY ADJUSTABLE TYPE BOTTOM BRACKETS.. ROUND PIN ENDS HAVE A DIAMETER OF 2.9MM.. MODEL:SPA-2.. TOUGH HIGH CARBON STEEL.. HANDLE IS VINYL COATED.. FITS ONE KEY RELEASE RETAINING RINGS ON SHIMANO AND CAMPAGNOLO CRANKSETS.. AND THE ADJUSTING CONE ON MOST FREEWHEEL CLUSTERS (NOT FREEHUBS).. ADJUSTS TO A WIDE RANGE OF PIN HOLES.. PIN DIAMETER IS NOMINALLY 0.090" (2.3MM)