Constructed from precisionmachined 4140 steel the BBT118 is a heavy duty tool for the removal and installation of select bicycle components with an 8notch tool fitting \n Features an extra deep body to accommodate extra wide spindles and low profile walls at the point of engagement for recessed lockrings \n Three methods of tool engagement include a 3/8" drive fitting, a 1" hex fitting, and 36mm wrench flats