DragHandler not registering Drag

I am trying to create a drag & drop system without using OnMouseOver, however I just can't get this to work. I have the following script attached to a Cube, which I want to be able to drag. The cube also has a collider attached. Why is it not working?

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 
 public class ItemDragHandler : MonoBehaviour, IDragHandler,IEndDragHandler 
 {
 
 
 
     public void OnDrag(PointerEventData eventData)
     {
         Debug.Log("x");
     }
 
     public void OnEndDrag(PointerEventData eventData)
     {
         Debug.Log("z");
     }
 
 }