ø35mm or ø30mm | Sheet metal punch, Forstner drill or dry drill with diamond hollow drill bit

Typical drill bits for faucets or operating faucets for under-sink ionizers | ø32 or ø35Bosch dry speed slide dry drill for stoneSheet metal punch (hole cutter) for sheet metalForstner bit for wood and plasticInstallation Videos | various 35mm drill bits for various water filters or under-sink water ionizersInstallation video | Safety three-way tap for water filtersInstallation | Undersink Water Ionizer | GenerallyInstallation with sheet metal punch| EOS Revelation II | Stainless steel sinkInstructions Installation | Under-sink ionizer on ceramic sink