The blade of the tank cutter cuts through the material at hand.
Its length can be adjusted so that the tool can be used to cut holes of different sizes.
The greater the distance between the pilot drill and the outside edge of the blade, the larger the circle cut.
Tank cutter adjusting screws
Tank cutters usually have two adjusting screws that hold the blade and pilot drill in place.
When either screw is loosened using a screwdriver, the respective part can be adjusted to suit the needs of the user, or removed if it needs to be replaced, after excessive use.
The parts of some tank cutters are secured by hexagonal nuts.
These tank cutters are supplied with an allen key (or hex wrench) that is used to loosen or tighten the adjusting nut.