The Smoktech Caterpillar RDA has 3 posts which allows it to be setup in a single or dual coil configuration. Three brass knurled screws (Slotted for a flat head screwdriver) with holes in each post for threading the leads of resistance wire. A deep juice well decreased the need to frequent refilling. Stainless Steel body and top cap with a polished brass ring to adjust the airflow gives the Caterpillar a great appearance
