Front ABS Sensors

[trueblue]

I have had to punch out the old ABS sensors, which has obviously wrecked them, from both front hubs. Now all I am left with in the hub is a metal liner with a punched hole in it :?
Is this part of the sensor or is it a seperate peice that I will need to replace ?
Any help greatly appreciated.

 

[Bentleya]

It's part of the sensor and needs to be removed before fitting new sensors.

 

[trueblue]

Thanks Aaron