AUTOT3K

iTrader: (3)

I have one of each in my tool box, I find the screwdriver style works well with laser/iridium tips and the circle one works great with regular copper tip plugs, both are less then $10 from snap on too so why not

TIM Z

iTrader: (12)

I use the cheap little circle also ,

But for you guys that don't know , your not supposed to use these on iridium tipped plugs I've been told as you can rub off the iridium .

This is only what I've been told so anyone with direct knowledge can verify, but I bet the Pliers that Corey is talking about will prevent this issue for you guys who are running these stock plugs.

silver-mod-o

iTrader: (15)

Nobody uses feeler gauges anymore? Lol

BlackGMC

iTrader: (31)

That is what i have used for the last 15years. This thread was just to see if something new/better has come along. I have never used the round circle thing but i picked one up when i ordered some new plugs.

03sierraslt

iTrader: (22)

Yep, I use them all the time at work... Just not for spark plugs.

AUTOT3K

iTrader: (3)

I use them lots too, but I don't think I've ever used them on spark plugs haha
feeler gauges are never used properly anymore, I see people ram them in so hard they're bending and crimping but it fits so it must be 0.0XX" right?

SamuelsonMotorsports

iTrader: (1)

I use this guy. Works on all plugs just fine- I use it in conjunction with feeler gauges if im not in a hurry.



Mine is a snap on or blue point, can't remember which. Works great though and never damages the tips.

Personally, I grew up with this one below and "went" to the one above. Same thing, different application.