TKO Hole Cutters offer the most efficient and cleancutter replacement for traditional knockouts, by makingsmooth holes in a fraction of the time at a fraction of thecost. Specifically designed to cut sheet metal, TKO cutterswill even cut stainless steel with fine grained, carbidetips. The innovative design includes the exclusiveSmoothStart replaceable pilot drill, which guides thecutter to the surface, avoiding cutter damage andproviding smoother holes. An integral overdrill flangeprevents cutter penetration beyond the sheet metal.When it comes to quality, performance and durability,IDEAL is the professionals choice for carbide tippedhole cutters