Round tails, sometimes referred to as “thumb” tails, provide the most lift out of the curved tail designs. Release is smooth along the rail, but the rail template is straighter in the full round tail than the next tail down the line – the Round Pin.The feeling can be very similar to the squash tail, but tends to produce smoother, more open turns. The Round Pin, however, pulls the tail template in much sooner, feeding into a pulled but curved tail shape with less curve acceleration where the rails converge. Due to the reduced planing surface of rounded pins, the back foot is placed further forward than would be placed on a squash or rounded square tail, making these tail shapes better suited for large, steep, hollow surf and making quick adjustments dropping in late and negotiating the Barrel.  True pin tails are reserved for big wave guns, as surface area and lift are severely minimized in an effort to focus on control and easy rail-to-rail transfer at top speeds.