40CR material, black finish Easy and fast removing ball bearing by using the puller, for larger sized bearing Select proper tips by ball diameter CONTENTS : 1 PC. Puller yoke and center screw 4PC. Extension rod Ball ended threaded adapter : 2 PC. 15.0mm / 2 PC. 17.4mm 2 PC. 20.0mm / 2 PC. 25.2mm 2 PC. 30.0mm / 2 PC. 36.4mm