This Tct Countersink Clamps Onto Any Drill Between 3.0Mm And 7.2Mm In Diameter. Recommended For Wood And Man-Made BoardsBy Reversing The Countersink On The Drill It Can Be Used As A Non-Cutting Depth Stop. Ensure Flutes Of Drill Are Aligned With Flutes Of Countersink.Do Not Overtighten Screw.Not Suitable For Production Applications And Not Suitable For Ferrous And Non-Ferrous Metals.PTDTREDIRUNICS
