You need a 8MM one.
TORX T-15
Torx #45
Torx T-55. A torque angle meter should be used to install them the correct number of degrees on final tightening. These head bolts are TTY (Torque To Yield) and are actually stretched beyond their elastic limit when installed. New head bolts must be used on reassembly or gasket failures are likely.
Any type of socket can be used to remove a 91' Cavalier wheel cylinder bolt that looks like a reversed torx. However, make sure the socket is a bolt head socket.
The caliper bolts on a 2008 Mazda 6 typically use a standard hex head (metric) bolt. These bolts are often 12mm in size, but it's essential to verify the specific model and trim, as variations may exist. Torx or Allen head bolts are not standard for this vehicle. Always consult the vehicle's service manual for precise specifications.
Its a torx head T55 not an Allen wrench
torx key t25
The caliper torx bolts on a 2002 Vauxhall Corsa 1.7 typically use T50 torx bolts. It's essential to ensure you have the correct size when working on the brake calipers to avoid stripping the bolts. Always refer to the vehicle's service manual for specific details and torque specifications when servicing brakes.
the size is E14
I believe it to be a T-55 torx.
The correct size Torx bit is a T-55.