Does Not Contain Definition Of enabled?

private BoxCollider Hand_L; private BoxCollider Hand_R;

 private Animator anim;
 private BossHealth bossHealth;

 void Awake ()
 {
     anim = GetComponentInChildren<Animator> ();
     bossHealth = GetComponentInChildren<BossHealth> ();

     Hand_L = GameObject.FindGameObjectWithTag ("Hand_L").GetComponent<BoxCollider> ();
     Hand_R = GameObject.FindGameObjectWithTag ("Hand_R").GetComponent<BoxCollider> ();

 
 }

 
 // Update is called once per frame
 void Update () {


     if (bossAwake) {
         print ("Boss is Awake");

         anim.SetBool ("bossAwake", true);

         if (inBattle) 
         {
             if (!attacking) {
                 idleTimer += Time.deltaTime;
             } else {
                 idleTimer = 0.0f;
                 attackTimer += Time.deltaTime;
                 if (attackTimer > attackWaitTime) {
                     attacking = false;
                     attackTimer = 0.0f;
                     print ("Boss SMASH");

                     **Hand_L.collider.enabled = true;
                     Hand_R.collider.enabled = true;**
                 }
             }