Reduce (horizontal) spacing between row elements

I am having trouble reducing the horizontal spacing between the elements inside a row. My code looks like this:

<div class="row">
    <div class="col s4 m4 l4">
         <div class="icon">
              <a href="#">
                  <i class="fab fa-twitter fa-2x"></i>
              </a>
         </div>
    </div>
    <div class="col s4 m4 l4">
         <div class="icon">
              <a href="#">
                  <i class="fab fa-instagram fa-2x"></i>
              </a>
         </div>
    </div>
    <div class="col s4 m4 l4">
         <div class="icon">
              <a href="#">
                  <i class="fab fa-instagram fa-2x"></i>
              </a>
         </div>
    </div>
</div>

.icon i {
  border-radius: 50px;
  box-shadow: 0 10px 10px rgba(0, 0, 0, 0.3);
  width: 50px;
  height: 50px;
  -webkit-transition: all 0.3s ease-in;
  transition: all 0.3s ease-in;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
       -ms-flex-align: center;
            align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
           justify-content: center;
   margin: 0 auto;
   color: #ffffff; 
 }

So I would like to have the social buttons closer to each other. I tried decreasing the width of the row and experimented with the materialize tags but sadly nothing worked. Would appreciate some help on this issue.