The Serrounded punch is a serrated tip punch. This punch is much sharper than the classic CII punch. The Serrounded Punches are available in many different sizes. These punches are exclusively available for use with the Programmable Cole Isolation Device (PCID). The Serrounded punches reduce the cutting surface in contact with the skin at any given moment. This reduces friction even more than with the thin-walled, razor-sharp classic CII punches. The serrated tip also helps the punch gain a grip on contact with the skin. This feature is particularly useful with the PCID.