Centered icons with float:left

Centered icons with float:left

I have a problem with the centering icon
CSS:
.icons .overview {
position: relative;
float: left;
width: 16.6666666667%;
text-align: center;
overflow: visible;
}
.icon {
display: inline-block;
width: 64px;
height: 64px;
cursor: help;
margin-bottom: 20px;
}
Website: http://www.plus-seo.pl/ category "Oferta" Any ideas?