This bracket is designed to hold a nema 17 stepper motor, with the necessary clearance to fit a E3D Titan extruder.
It is meant to be mounted on a 6mm slot aluminum profile with M4x10 mm metric screws.
The position of the mounting holes is slightly off-centered to gently press one side of the stepper on the profile surface, granting some passive cooling.
It has been tested for several hours at 2A settings with no problem.
PLA should be fine, but better safe than sorry: validate your setup with some good stressful, long prints.