Heat treated alloy tool steel, one inch base fits wrench or bench vise. Thin wall construction allows use without removal of cones and locknuts. Part of a comprehensive range of freewheel removal toolsOversized centre hole and thin wall design allows use without removal of cones and locknutsInvestment cast and heat-treated for strength and durabilityOne-inch base fits end of SR-1, FRW-1 Park tools or simply an adjustable wrench or bench viceFits Sun Tour two notch freewheelsAlways use a skewer or axle nut to hold remover firmly in place