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The correct size Torx bit is a T-55.
T-55
Its not to hard just some turns can be hard to get the torx bolts that hold it in place.
Number 10 Torx works on a 2003 Jeep Wrangler. Fairly simple. Just remove the 3 holding the rim on, then the 4 holding the lamp in. I was able to change 2 lights in less than 1/2 hour.
I used a T40 on my 1997 Wrangler on the forward brackets of the fold-and-tumble rear seat.
I believe it to be a T-55 torx.
Torx is a 50 and they are really tight.
should be an Allen head or torx screw in the center of the crank.
Torx are almost never used on calipers. I think you will find a 7mm Allen key is needed for that year Mercury. Hard to see as it is covered by a rubber cup.
The T60 is the size needed to remove caliper bracket.
T55 TORX BIT ON THE FRONT 12MM SOCKET ON THE REAR!
It uses a T45 Torx bit.