Full rather windy story. As I walked past a neighbor I saw he couldn't get the rotor off to replace the front drive axle. I didn't get real close (fence between us) but from about 10 feet away it looked like the center of the screw was stripped out deeply, almost like drilled part way through. He had pounded a torx bit in but it apparently didn't grab enough. Maybe he didn't have a bigger torx bit that would work, I don't know. I got my set and handed it over the fence. Later when I returned home he handed them back with a thumbs up and a thanks and showed me the remains of the screw.
To answer your question, these bits don't have to be pounded in heavily as the spiral ridges dig in as it's rotated. Kind of like a turbo socket, only the male version.
They do dig in well. Another time helping another neighbor trying to remove a stripped out ,seized, caliper mounting bolt on his full size GM SUV, the bit gripped enough to where I could feel the shank of the long bolt twist and spring back when released but the threads were too rusted to come free so it got drilled out. GM used an 11mm bolt with a 9mm allen socket head and luckily the local hardware store had an M11-1.5 tap to help finish the job. And even though this bit couldn't remove that particular bolt, I like that this smaller set( IIRC there is a larger set available), should the need arise again for this oddball size, had a 9mm bit instead of jumping from 8mm to 10mm.
*** I added another picture here and above in case you didn't check out the Amazon link.