INKUTEN HP Ink Refill Tool for 952 952xl Ink Cartridges for HP OfficeJet Pro 8710 8720 8730 8740 Printers;

Drilling holes can leave debris and leaves the cartridge to dry out easy, the other generic ink/cartridges are not HP quality and may permanently damage your print heads and they do not regulate pressure which is required for the best quality printing! HP ink cartridge have special pressure equilibrium design and the cheap knock-off's do not have this and leave you with an inferior quality. This product allows you to keep your own existing HP cartridge, which is the highest quality, empty and refill it like they do at the factories, and use it for high quality printing for a long time at the optimum pressure.

This will work with newer HP cartridges with chips. As soon as you receive the "low ink notification" you should fill up the cartridge. If you do not do this, and let the cartridge go completely empty, then you can still fill it and print fine, however there will be a 'warning' indicator that your cartridge is empty that does not go away. In this case, you can either continue to use it (no performance loss, just the error message), or replace the chips available from INKUTEN.