I have a few Honda cars and bikes in the family, I had for years used flat edge screw drivers or and the plastic plugs got older punched and as the last result drills. It seems after about 6 removals the plugs started to fail. I had a Honda that after 200k things just needed to be replaced, water pump, radiator fan, Fan temp sensor, thermostat, alternator, starter, and then battery. these all failed one after the other and about a week to a month apart. I used these and the plastic plugs still look brand new. BTW I have no problem with this Honda for 14 years so it was due.