I have found the metal is hard and wear resistant. I have used it for pulling four 6203 bearing and used quite a bit force, no sign of wear on the lips.
The pin for pushing/locking the front lips is a bit rough so it needs some polishing and greasing. afterwards, the puller can lock properly and it won't slip which can damage the puller.
Overall, the tool kit is very good value and reasonably good quality, with a little bit polishing, it can do a very good job.
8pcs 4 Flutes Carbide End Mill Set 2-12mm Tungsten Steel Milling Cutter Tool CNC
03 September 2018
Good quality & value
I bought these for milling mainly soft materials, they do the job well. They also look very refined and with very reasonable price.